Boulder, Montana: Gateway to Mountain Adventures and Historic Healing Waters

Boulder, Montana is a rugged frontier town nestled in a beautiful valley surrounded by mountains where adventure seekers find their paradise. With the majestic Boulder River carving its path along the south end of town, this hidden gem offers a perfect basecamp for explorers seeking to discover ghost towns, soak in natural hot springs, and venture into the surrounding wilderness. Positioned midway between Butte and Helena at the intersection of Interstate 15 and Montana Highway 69, Boulder serves as a gateway to countless outdoor adventures while maintaining its authentic small-town Montana charm. Whether you're hunting for gold in mountain streams, hiking through pristine forests, or exploring the unique radon health mines, Boulder invites you to experience the wild spirit of Big Sky Country.

Quick Facts

Population: 1,201 (2020 Census)
County: Jefferson County (County Seat)
Founded: Early 1860s (as Boulder Valley); renamed Boulder in 1897
Elevation: 4,990 ft
Known For: Hot springs, radon health mines, historic buildings, gateway to outdoor recreation
Nearby Landmarks: Boulder Batholith, Boulder River, Elkhorn Mountains, Continental Divide
Fun Fact: Boulder was once a candidate to become Montana's state capital in 1892, though it finished last in the voting with only 295 votes.

Notable People & Pop Culture

Patrick Duffy – Actor known for his roles in the television series "Dallas" and "Step by Step," born and raised in Boulder.
James E. Riley – Pioneer and prospector who built the first structure on the site of what would become the Boulder Hot Springs in 1863.
Montana Developmental Center – While not a person, this historic institution has been featured in various documentaries about healthcare and social services in rural America.

Top Things to Do in Boulder

✧ Boulder Hot Springs Inn & Spa – Soak in mineral-rich waters at this historic hotel and spa dating back to the 1860s, offering natural hot springs with healing properties.
✧ Radon Health Mines – Experience the unique and controversial radon therapy mines that attract visitors seeking alternative treatments for various health conditions.
✧ Boulder River Recreation – Fish for trout, float on inner tubes, or hike along the scenic Boulder River that runs through the south end of town.
✧ Veteran's Memorial Park – Enjoy picnicking, RV parking, and community events at this central green space on Main Street.

Local Industry & Economy

Boulder's economy is deeply rooted in healthcare, social services, and government operations, with the Montana Developmental Center employing approximately 300 residents as the town's largest employer. Youth Dynamics, Inc. (Alternative Youth Adventures) provides residential services for troubled youth and employs about 100 people, while Riverside Corrections, a state-run detention center for juvenile females, adds another 30 jobs to the local workforce. The unique radon health mines in the area contribute to tourism, drawing visitors seeking alternative treatments for autoimmune conditions despite scientific controversy. Agriculture remains important in the surrounding Boulder Valley, with ranching and farming operations supporting the local economy. With a median household income between $42,000 and $48,800 (as of 2021), many residents commute to larger cities like Helena and Butte for employment, while maintaining Boulder's small-town character and community-focused lifestyle.

History & Heritage

Named for the many large boulders scattered throughout the valley, Boulder began as a stagecoach station in the early 1860s, serving travelers on the route between Fort Benton and Virginia City. The settlement quickly evolved into a trading center for nearby agricultural areas and the Elkhorn, Comet, and Baltimore mining districts, with the discovery of gold in the region fueling its early growth. A significant development came in 1888 when the Great Northern Railway branch line from Helena to Butte reached Boulder, enhancing transportation and commerce. In 1892, state schools for the deaf, blind, and developmentally disabled were established in the city, institutions that would shape Boulder's identity and economy for generations to come. Originally called Boulder Valley, the town's name was shortened to Boulder in 1897. The area's geological history is equally fascinating, with the Boulder Batholith—a massive intrusive body of granitic rock formed 81 to 74 million years ago—extending from Helena to Butte and hosting valuable mineral ores that attracted miners to the region. Today, Boulder preserves its heritage through three buildings listed on the National Register of Historic Places: the Jefferson County Courthouse (added 1980), the Montana Deaf and Dumb Asylum (added 1985), and the Boulder Hot Springs Hotel.

Seasonal Activities & Local Events

Spring/Summer: Boulder Farmer's Market (Thursdays from early July through September), 4th of July Parade, fishing and floating on the Boulder River, hiking in the surrounding mountains, and exploring ghost towns.
Fall/Winter: Cross-country skiing, snowshoeing, hunting season, and winter hot springs soaking at Boulder Hot Springs.
Annual Events: Boulder Community Wide Garage-Yard Sale (Father's Day Weekend), Boulder Annual Classic Car Show (Saturday before Labor Day), Boulder Annual Music and Art Festival (first full weekend in September), and Boulder Annual Holiday Christmas Bazaar (Saturday before Thanksgiving).

Getting There & Nearby Destinations

Boulder is strategically located at the intersection of Interstate 15 and Montana Highway 69, making it easily accessible by car. The town sits 28 miles from Helena and 34 miles from Butte, with both cities offering commercial airports for visitors flying in. Helena Regional Airport (44 miles away) and Bert Mooney Airport in Butte (35 miles away) provide connections to major hubs. For those preferring ground transportation, Salt Lake Express offers bus service to the area. Nearby destinations worth exploring include Basin (9 miles south), a local artists community with cafés, saloons, and pottery galleries situated on the Boulder River; Jefferson City (accessible via I-15 Exit 176), home to Montana's favorite botanical gardens and arboretum at Tizer Gardens; and numerous ghost towns, hiking trails, and fishing spots throughout Jefferson County. The Beaverhead-Deerlodge National Forest offers extensive outdoor recreation opportunities just a short drive away.

Where to Stay in Boulder

Accommodation options in Boulder cater to various preferences, with the historic Boulder Hot Springs Inn & Spa serving as the premier lodging destination. This historic hotel offers guests access to natural mineral hot springs along with comfortable rooms in a building listed on the National Register of Historic Places. For travelers seeking more budget-friendly options, the Mine Motel and O-Z Motel provide clean, comfortable rooms with convenient access to Boulder's attractions and main thoroughfares. RV travelers can find parking at Veteran's Memorial Park on Main Street, which offers green space and picnic tables. While Boulder's accommodation options are limited compared to larger Montana cities, the authentic experience and proximity to natural attractions make it an ideal base for exploring Jefferson County and southwestern Montana.

Plan Your Visit

Ready to explore Boulder? Add it to your Montana travel itinerary and discover the charm, history, and adventure waiting in Big Sky Country.