The lot is triangularly configured, with the southern apex at Borglum Road and the parcel widening progressively to the north. Total area is 4.42 acres. Elevation ranges from 4,069.5 feet at the southern end near the road down to 3,922.0 feet at the lower northern extent, a total relief of 147.6 feet. Average slope is 19.6 percent, ranging from a minimum of 6.9 percent on the more gradual upper benches to a maximum of 33.3 percent on the steeper pitches. The most practical building area is concentrated near the Borglum Road frontage and on the more gradual benches in the upper southern portion of the lot, where a two-track trail has been established.

Land cover as of 2024 is approximately 47.6 percent evergreen forest (Ponderosa pine), 47.6 percent grassland and pasture, and 4.8 percent developed or low-intensity disturbed area. The soil unit across the entire parcel is the Sawdust-Hopdraw-Rockerville complex on 10 to 40 percent slopes, typical of shallow, rocky Black Hills forest soils. No FEMA flood hazard is mapped within the parcel boundaries.

Improvements

An existing two-track trail leads to the bottom of the property from Borglum Road. A small shed and playhouse on stilts are located toward the lower end of the parcel.

Recreation

Borglum Ranchette sits at the hub of Black Hills recreation, placing a buyer within minutes of some of the most iconic outdoor destinations in the country. Mount Rushmore National Memorial is just up the road, and the surrounding Black Hills National Forest opens onto a vast trail system for hiking, horseback riding, and all-terrain vehicle exploration. Black Elk Peak, at 7,244 feet the highest summit east of the Rocky Mountains, is reachable from that same forest network and rewards the climb with panoramic views across the granite spires of the Needles.

Custer State Park lies roughly 20 miles to the south, a 71,000-acre wildlife park home to one of the largest free-roaming bison herds in the country, along with elk, pronghorn, bighorn sheep, and the park’s famous begging burros. Within easy day-trip distance a buyer will also find the Crazy Horse Memorial, Jewel Cave National Monument, and Wind Cave National Park, one of the longest and most complex cave systems on earth.

Keystone itself delivers a full slate of family recreation. The historic 1880 Train runs vintage steam excursions between Keystone and Hill City, and Rush Mountain Adventure Park pairs the underground wonder of Rushmore Cave with a mountain coaster and aerial course. Rushmore Tramway Adventures adds ziplines, an alpine slide, and chairlift rides to a summit overlook. Anglers and boaters have their pick of nearby waters, with Sheridan Lake and Pactola Reservoir minutes away for trout, bass, and open water, while the 109-mile George S. Mickelson Trail offers premier rails-to-trails biking through the heart of the Hills. Winter brings snowmobiling and cross-country skiing across an extensive groomed trail network.

Closer to home, the lot itself provides on-property habitat for whitetail deer, wild turkey, and other Black Hills wildlife, letting owners enjoy the region’s natural character from their own ground. For the buyer seeking both a personal homesite and immediate access to the full range of Black Hills outdoor experience, this location is difficult to surpass.

Agriculture

Recorded subdivision covenants permit up to two horses and limited livestock on the property.

Water/Mineral Rights & Natural Resources

A shared community well is available to lot owners within Rushmore Ranch Estates. Terms of the shared-well agreement, associated water rights, and maintenance obligations should be confirmed through the title and closing process. Private on-site septic will be required; given the steep and rocky soils, an engineered system may be necessary and soil perc testing is recommended prior to offer. No surface water or drainage features are documented within the parcel. Any mineral ownership owned by the seller will convey at the time of sale.

General Operations

Road maintenance for Borglum Road and the internal subdivision network is funded through the Rushmore Ranch No. 1 Road District, a dedicated taxing district providing year-round road maintenance without reliance on a homeowner’s association. Recorded covenants govern land use within Rushmore Ranch Estates; a copy is available from the listing agent. Covenant provisions should be reviewed prior to purchase to confirm restrictions on building setbacks, land use, short-term rental, and livestock. No HOA dues are reported for this subdivision.

Region & Climate

Keystone is the gateway community to Mount Rushmore National Memorial and sits in the heart of the central Black Hills, one of the most recognized geographic destinations in the American Great Plains. The Black Hills rise dramatically from the surrounding prairie and support a distinct ecosystem of Ponderosa pine forest, granite peaks, and prairie grassland parks. The climate at this elevation is notably milder than the surrounding plains in summer and more snowfall-productive in winter, with annual precipitation averaging 18 to 22 inches. Summers are warm and dry, making the area a premier destination from May through October. South Dakota imposes no state personal income tax, a significant draw for retirees and second-home buyers relocating from higher-tax states. The Black Hills real estate market, particularly in the Keystone and Custer County corridor, has seen sustained appreciation driven by remote-work migration and continued tourism-economy growth.

History

The Black Hills carry a history as layered as their geology. The Lakota Sioux, who called the hills Paha Sapa, regarded the region as sacred ground and a center of cultural and spiritual life. The U. S. Army’s 1874 Custer Expedition confirmed rumors of gold in the hills and ignited one of the most consequential gold rushes in American history. Keystone was founded as a mining community in the 1880s and prospered through the early 20th century. The town’s enduring place in American culture was secured beginning in 1927, when sculptor Gutzon Borglum began carving the faces of four presidents into the granite of Mount Rushmore, a project completed in 1941. Borglum Road, on which this property fronts, carries the sculptor’s name as a lasting acknowledgment of the transformation he brought to this corner of the Black Hills. The corridor from Keystone to Mount Rushmore has evolved from a mining camp road into one of the most traveled scenic byways in the American West.

Location

Approximately 13 minutes to Keystone and 30 minutes to Rapid City. Mount Rushmore National Memorial is a short drive via Borglum Road and South Dakota Highway 244. Custer State Park is approximately 20 miles south via US 16A. Rapid City Regional Airport is approximately 30 miles northwest, providing commercial air service with connections to major hubs. The property is accessed via Borglum Road with direct frontage along the southwestern boundary. Rushmore Ranch Road off South Dakota Highway 40 provides the primary route from the state highway network. Full commercial services, hospital-grade medical, and major retail are available in Rapid City.