Relocation

Compare Black Hills Communities

25 towns and unincorporated communities. Pick two to four and the full table appears underneath. Commutes are driving times to the Ellsworth main gate and downtown Rapid City. Median sold prices, where we have them, come from the MLS over the trailing twelve months with the source, window and sale count printed under each figure. Typical price bands are practical search ranges, not medians, and are labelled separately.

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Under $400k Close to Ellsworth Close to Rapid City Short commute New construction available Acreage available City water and sewer Smaller market More rural Established housing Newer housing Clear filters Clear everything

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What changes

Between St. Onge, Keystone, Rapid Valley

The rows below are the ones where these do not read the same. Ordered as the table runs, not by importance.

Region: St. OngeNorthern Hills and I-90KeystoneCentral and Southern HillsRapid ValleyRapid City and the Ellsworth corridor
County: St. OngeLawrence CountyKeystonePennington CountyRapid ValleyPennington County
Jurisdiction: St. OngeUnincorporated. No town government. Lawrence County zones the parcels and the Sheriff patrols them.KeystoneIncorporated town of Keystone, with unincorporated Pennington County on the surrounding hillsides.Rapid ValleyUnincorporated. There is no city government. Pennington County is the governing body, and Rapid City's subdivision rules still apply within three miles of the city limits.
Corridor: St. OngeSD 34, with I-90 seven miles southeast at WhitewoodKeystoneUS 16ARapid ValleySD 44 and Elk Vale Road
To downtown Rapid City: St. OngeAbout 44 miles, roughly 48 minutesKeystoneAbout 25 minutes northeastRapid Valley11 min, 5.2 mi
To Ellsworth AFB: St. OngeAbout 45 milesKeystoneAbout 40 minutesRapid Valley22 min, 10.4 mi

Side by side

St. Onge, Keystone, Rapid Valley

Rows marked as differing are the ones where these do not read alike. Rows without the mark sit on a quiet background because they say the same thing in every column.

The selected Black Hills communities compared on location, housing, utilities, schools, daily errands, mapped subdivisions and the trade each one asks for
Attribute	Northern Hills and I-90St. Onge	Central and Southern HillsKeystone	Rapid City and the Ellsworth corridorRapid Valley
Where it sits
Regiondiffers	Northern Hills and I-90	Central and Southern Hills	Rapid City and the Ellsworth corridor
Countydiffers	Lawrence County	Pennington County	Pennington County
JurisdictiondiffersCity versus county decides who provides service and who inspects the work.	Unincorporated. No town government. Lawrence County zones the parcels and the Sheriff patrols them.	Incorporated town of Keystone, with unincorporated Pennington County on the surrounding hillsides.	Unincorporated. There is no city government. Pennington County is the governing body, and Rapid City's subdivision rules still apply within three miles of the city limits.
Corridordiffers	SD 34, with I-90 seven miles southeast at Whitewood	US 16A	SD 44 and Elk Vale Road
To downtown Rapid Citydiffers	About 44 miles, roughly 48 minutesDriving time and distance, off peak.	About 25 minutes northeastDriving time and distance, off peak.	11 min, 5.2 miDriving time and distance, off peak.
To Ellsworth AFBdiffers	About 45 milesDistance only. Drive time is not measured for this community, so time it from the parcel.	About 40 minutesDriving time and distance, off peak.	22 min, 10.4 miDriving time and distance, off peak.
Winter drivingdiffers	Highway 34 is state maintained and connects three directions. County and private roads off it are a different conversation.	Black Hills elevation on canyon roads, and a town that empties out for the season. Iron Mountain Road and the scenic routes are not winter commuting roads.	Highway 44 and Elk Vale are state and county priorities. Interior subdivision streets are county maintained and clear after the arterials do.
Housing and lots
Typical pricediffers	No figure published. St. Onge is Mount Rushmore Area MLS territory and the current feed covers only the Black Hills MLS, so a zero here would be a gap in the data rather than a fact about the market.	About $618,000 average sold, but only 9 sales over 24 monthsAverage sold $618,449. Black Hills MLS, single family, 24 months through August 2026, as of August 2026. 9 closed sales, small sample.	About $350,000 average sold, 274 sales over 12 monthsAverage sold $349,971. Black Hills MLS, single family, 12 months through August 2026, as of August 2026. 274 closed sales.
Housing agediffers	An 1891 townsite with genuinely old buildings, surrounded by ranch and acreage property of every era.	An 1883 mining town, so genuinely old stock alongside newer builds and cabins.	Mostly late twentieth century through current, with active building on the edges.
New constructiondiffers	Limited, mostly infill and small projects	Limited, mostly infill and small projects	Active, with subdivisions still building
Acreagediffers	Acreage parcels are common here	Some acreage, mostly platted town lots	Some acreage, mostly platted town lots
Typical lotdiffers	Small townsite lots, with acreage and ranch ground around them.	Small and steep in town, larger on the surrounding hillsides outside the limits.	Suburban lots through the core, larger parcels toward Reservoir and Radar Hill Roads.
Covenants and HOAdiffersCovenants are recorded per plat. The title commitment lists what binds the parcel.	Few plats here carry recorded covenants	Few plats here carry recorded covenants	Recorded covenants on some plats, none on others
Utilities and rules
Utility patterndiffers	Mostly private well and septic	Mixed, municipal service in town with well and septic outside it	Utility service varies by address. Rapid Valley Sanitary District serves portions of the area, while properties outside district service may use private wells and septic systems.
Waterdiffers	The Saint Onge Sewer and Water Company serves about 78 connections around the townsite, with a clean compliance record. Parcels outside that system are on private wells. There is no rural water district covering this area.	Town of Keystone municipal water inside the limits, drawn from town wells, with no violations on its current record. Parcels outside the town limits are on private wells.	Rapid Valley Sanitary District, treating Rapid Creek water at its own plant, with the ability to buy treated water from Rapid City at peak demand. Parcels outside the district are on private wells.
Sewerdiffers	The water company's name implies sewer service, but I have not been able to verify from the public record which parcels it reaches. Assume private septic outside the townsite and confirm the rest before closing.	Confirm with the town before you rely on it. The town operates public works, but I have not been able to verify from the public record whether it runs a collection system or which parcels it reaches. Outside the limits, expect private septic.	Rapid Valley Sanitary District owns and maintains the collection system, and Rapid City treats the wastewater under an intergovernmental agreement. Parcels outside the district are on private septic.
Fire protectiondiffersThe responding department and the distance to it both affect an insurance quote.	Not recorded townwide in this guide. Confirm the responding department by address.	Not recorded townwide in this guide. Confirm the responding department by address.	Rapid Valley Volunteer Fire Department, which also provides EMS and wildland response.
Short term rentalsdiffers	Unincorporated Lawrence County, so no municipal ordinance applies. Note that unincorporated Lawrence County declined to require a vacation home rental permit, so there is no county permit to obtain either.	A 2 percent municipal lodging tax applies to transient stays. Whether a separate short term rental ordinance exists is not clear from the public record, so confirm with the town in writing.	Unincorporated Pennington County has no city short-term rental ordinance to comply with, which is not the same as no rules. County zoning and any subdivision covenants still govern, and state licensing applies.
Schools
School districtdiffers	Spearfish 40-2 at the townsite, with Belle Fourche 09-1 to the north and Meade 46-1 to the east. Parcel specific.Assignment follows the official boundary for the address. Confirm with the district.	Hill City School District 51-2Assignment follows the official boundary for the address. Confirm with the district.	Mostly Rapid City Area School District 51-4, with portions in Douglas 51-1Assignment follows the official boundary for the address. Confirm with the district.
Daily errands
Groceriesdiffers	Nothing in town. Spearfish is eleven miles southeast and Belle Fourche thirteen northwest.	Nothing full service in town. Hill City is the closest small grocery and Rapid City is the real shopping, about 25 minutes northeast.	Retail and everyday shopping run along Highway 44 on the southern edge, with additional grocery options a few minutes west in Rapid City.
Healthcarediffers	Monument Health Spearfish Hospital, a 35 bed facility with a 24 hour emergency department, about 18 minutes away.	No clinic in town. Monument Health Custer Hospital has a 24 hour emergency department, and Rapid City has the larger hospital.	Monument Health Rapid Valley Clinic provides primary and urgent care in the community. Hospital-level care is in Rapid City.
Recreationdiffers	Creek bottoms, hay ground and hunting country, with Spearfish Canyon and the northern Hills half an hour away.	Mount Rushmore is past the town boundary, the 1880 Train runs from the Winter Street depot, and Custer State Park and the Norbeck Scenic Byway are close.	Rapid Creek, the county parks east of town, and everything the Hills offer half an hour west.
The trade
Housing and patterndiffers	An 1891 French-Canadian railroad townsite that is now a cattle auction crossroads and an acreage corridor.	An 1883 mining camp turned tourism town at the gateway to Mount Rushmore, 240 residents and millions of visitors.	The region's largest unincorporated community: suburban streets, high ownership, county government.
What you gaindiffers	The cheapest ground in the northern Hills that still puts you eleven miles from a hospital and sixteen from three towns.	Nightly rental demand runs about as high as anywhere in the Black Hills, if the rules and the covenants check out for the specific property.	Rapid City schools and a five mile commute without Rapid City property taxes, plus a walk-in clinic in the neighborhood.
What you give updiffers	A three-way school district split you have to verify per parcel, and no services of any kind in town.	A seasonal town with no school, no grocery and no clinic, and a housing stock where half the doors are dark in winter.	No city services, a sanitary district bill instead of a city utility bill, and an annexation line that only the parcel record can settle.

Northern Hills and I-90St. Onge
Central and Southern HillsKeystone
Rapid City and the Ellsworth corridorRapid Valley

Where it sits

Regiondiffers

St. Onge: Northern Hills and I-90
Keystone: Central and Southern Hills
Rapid Valley: Rapid City and the Ellsworth corridor

Countydiffers

St. Onge: Lawrence County
Keystone: Pennington County
Rapid Valley: Pennington County

Jurisdictiondiffers

City versus county decides who provides service and who inspects the work.

St. Onge: Unincorporated. No town government. Lawrence County zones the parcels and the Sheriff patrols them.
Keystone: Incorporated town of Keystone, with unincorporated Pennington County on the surrounding hillsides.
Rapid Valley: Unincorporated. There is no city government. Pennington County is the governing body, and Rapid City's subdivision rules still apply within three miles of the city limits.

Corridordiffers

St. Onge: SD 34, with I-90 seven miles southeast at Whitewood
Keystone: US 16A
Rapid Valley: SD 44 and Elk Vale Road

To downtown Rapid Citydiffers

St. Onge: About 44 miles, roughly 48 minutesDriving time and distance, off peak.
Keystone: About 25 minutes northeastDriving time and distance, off peak.
Rapid Valley: 11 min, 5.2 miDriving time and distance, off peak.

To Ellsworth AFBdiffers

St. Onge: About 45 milesDistance only. Drive time is not measured for this community, so time it from the parcel.
Keystone: About 40 minutesDriving time and distance, off peak.
Rapid Valley: 22 min, 10.4 miDriving time and distance, off peak.

Winter drivingdiffers

St. Onge: Highway 34 is state maintained and connects three directions. County and private roads off it are a different conversation.
Keystone: Black Hills elevation on canyon roads, and a town that empties out for the season. Iron Mountain Road and the scenic routes are not winter commuting roads.
Rapid Valley: Highway 44 and Elk Vale are state and county priorities. Interior subdivision streets are county maintained and clear after the arterials do.

Housing and lots

Typical pricediffers

St. Onge: No figure published. St. Onge is Mount Rushmore Area MLS territory and the current feed covers only the Black Hills MLS, so a zero here would be a gap in the data rather than a fact about the market.
Keystone: About $618,000 average sold, but only 9 sales over 24 monthsAverage sold $618,449. Black Hills MLS, single family, 24 months through August 2026, as of August 2026. 9 closed sales, small sample.
Rapid Valley: About $350,000 average sold, 274 sales over 12 monthsAverage sold $349,971. Black Hills MLS, single family, 12 months through August 2026, as of August 2026. 274 closed sales.

Housing agediffers

St. Onge: An 1891 townsite with genuinely old buildings, surrounded by ranch and acreage property of every era.
Keystone: An 1883 mining town, so genuinely old stock alongside newer builds and cabins.
Rapid Valley: Mostly late twentieth century through current, with active building on the edges.

New constructiondiffers

St. Onge: Limited, mostly infill and small projects
Keystone: Limited, mostly infill and small projects
Rapid Valley: Active, with subdivisions still building

Acreagediffers

St. Onge: Acreage parcels are common here
Keystone: Some acreage, mostly platted town lots
Rapid Valley: Some acreage, mostly platted town lots

Typical lotdiffers

St. Onge: Small townsite lots, with acreage and ranch ground around them.
Keystone: Small and steep in town, larger on the surrounding hillsides outside the limits.
Rapid Valley: Suburban lots through the core, larger parcels toward Reservoir and Radar Hill Roads.

Covenants and HOAdiffers

Covenants are recorded per plat. The title commitment lists what binds the parcel.

St. Onge: Few plats here carry recorded covenants
Keystone: Few plats here carry recorded covenants
Rapid Valley: Recorded covenants on some plats, none on others

Utilities and rules

Utility patterndiffers

St. Onge: Mostly private well and septic
Keystone: Mixed, municipal service in town with well and septic outside it
Rapid Valley: Utility service varies by address. Rapid Valley Sanitary District serves portions of the area, while properties outside district service may use private wells and septic systems.

Waterdiffers

St. Onge: The Saint Onge Sewer and Water Company serves about 78 connections around the townsite, with a clean compliance record. Parcels outside that system are on private wells. There is no rural water district covering this area.
Keystone: Town of Keystone municipal water inside the limits, drawn from town wells, with no violations on its current record. Parcels outside the town limits are on private wells.
Rapid Valley: Rapid Valley Sanitary District, treating Rapid Creek water at its own plant, with the ability to buy treated water from Rapid City at peak demand. Parcels outside the district are on private wells.

Sewerdiffers

St. Onge: The water company's name implies sewer service, but I have not been able to verify from the public record which parcels it reaches. Assume private septic outside the townsite and confirm the rest before closing.
Keystone: Confirm with the town before you rely on it. The town operates public works, but I have not been able to verify from the public record whether it runs a collection system or which parcels it reaches. Outside the limits, expect private septic.
Rapid Valley: Rapid Valley Sanitary District owns and maintains the collection system, and Rapid City treats the wastewater under an intergovernmental agreement. Parcels outside the district are on private septic.

Fire protectiondiffers

The responding department and the distance to it both affect an insurance quote.

St. Onge: Not recorded townwide in this guide. Confirm the responding department by address.
Keystone: Not recorded townwide in this guide. Confirm the responding department by address.
Rapid Valley: Rapid Valley Volunteer Fire Department, which also provides EMS and wildland response.

Short term rentalsdiffers

St. Onge: Unincorporated Lawrence County, so no municipal ordinance applies. Note that unincorporated Lawrence County declined to require a vacation home rental permit, so there is no county permit to obtain either.
Keystone: A 2 percent municipal lodging tax applies to transient stays. Whether a separate short term rental ordinance exists is not clear from the public record, so confirm with the town in writing.
Rapid Valley: Unincorporated Pennington County has no city short-term rental ordinance to comply with, which is not the same as no rules. County zoning and any subdivision covenants still govern, and state licensing applies.

Schools

School districtdiffers

St. Onge: Spearfish 40-2 at the townsite, with Belle Fourche 09-1 to the north and Meade 46-1 to the east. Parcel specific.Assignment follows the official boundary for the address. Confirm with the district.
Keystone: Hill City School District 51-2Assignment follows the official boundary for the address. Confirm with the district.
Rapid Valley: Mostly Rapid City Area School District 51-4, with portions in Douglas 51-1Assignment follows the official boundary for the address. Confirm with the district.

Daily errands

Groceriesdiffers

St. Onge: Nothing in town. Spearfish is eleven miles southeast and Belle Fourche thirteen northwest.
Keystone: Nothing full service in town. Hill City is the closest small grocery and Rapid City is the real shopping, about 25 minutes northeast.
Rapid Valley: Retail and everyday shopping run along Highway 44 on the southern edge, with additional grocery options a few minutes west in Rapid City.

Healthcarediffers

St. Onge: Monument Health Spearfish Hospital, a 35 bed facility with a 24 hour emergency department, about 18 minutes away.
Keystone: No clinic in town. Monument Health Custer Hospital has a 24 hour emergency department, and Rapid City has the larger hospital.
Rapid Valley: Monument Health Rapid Valley Clinic provides primary and urgent care in the community. Hospital-level care is in Rapid City.

Recreationdiffers

St. Onge: Creek bottoms, hay ground and hunting country, with Spearfish Canyon and the northern Hills half an hour away.
Keystone: Mount Rushmore is past the town boundary, the 1880 Train runs from the Winter Street depot, and Custer State Park and the Norbeck Scenic Byway are close.
Rapid Valley: Rapid Creek, the county parks east of town, and everything the Hills offer half an hour west.

The trade

Housing and patterndiffers

St. Onge: An 1891 French-Canadian railroad townsite that is now a cattle auction crossroads and an acreage corridor.
Keystone: An 1883 mining camp turned tourism town at the gateway to Mount Rushmore, 240 residents and millions of visitors.
Rapid Valley: The region's largest unincorporated community: suburban streets, high ownership, county government.

What you gaindiffers

St. Onge: The cheapest ground in the northern Hills that still puts you eleven miles from a hospital and sixteen from three towns.
Keystone: Nightly rental demand runs about as high as anywhere in the Black Hills, if the rules and the covenants check out for the specific property.
Rapid Valley: Rapid City schools and a five mile commute without Rapid City property taxes, plus a walk-in clinic in the neighborhood.

What you give updiffers

St. Onge: A three-way school district split you have to verify per parcel, and no services of any kind in town.
Keystone: A seasonal town with no school, no grocery and no clinic, and a housing stock where half the doors are dark in winter.
Rapid Valley: No city services, a sanitary district bill instead of a city utility bill, and an annexation line that only the parcel record can settle.

Where this comes from

Commute figures are driving times off peak, from the community guide each card links to. Median sold prices come from the MLS, and each figure carries its own source, window and closing count, because Sturgis, Spearfish and the northern hills report through a different MLS than Rapid City. Under five closings there is no median, and the price row says so. Five to nine closings carries a small sample note. School districts follow the official boundary for the address, and the district office is the only place to confirm an assignment. Short term rental lines are summaries. Read the guide and the current ordinance before you count on rental income.

The filters use these definitions: under $400k is the MLS sold figure for the town, a median where one is published and otherwise the average sold, comes in under $400,000; close to ellsworth is 25 minutes or less to the Ellsworth main gate; close to rapid city is 20 minutes or less to downtown Rapid City; short commute is 15 minutes or less to either downtown Rapid City or the Ellsworth gate; new construction available is the guide establishes active or limited new construction; acreage available is acreage is common or present in the guide; city water and sewer is city water and sewer across the community; smaller market is fewer than 100 closed single family sales in the trailing twelve months; more rural is acreage is common, or water and sewer are not municipal throughout; established housing is the guide classifies the housing stock as established, meaning largely pre 2000; newer housing is the guide classifies a meaningful share of the housing stock as 2000s or later.

Every row here is a townwide summary and a single parcel can read differently. Buyer due diligence should include verifying water and sewer service, school assignment, recorded covenants and HOA obligations, rental rules, legal access, insurance availability and which jurisdiction inspects and permits the work, for the exact address. Confirm with the city or county, the utility or district, the school district office, the title company and your insurer as applicable.

Last updated August 2026

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