Pioneer Mountains Backcountry Loop
Technical mining loop through forgotten peaks
The Pioneer Mountains hide some of Montana’s best-kept secrets behind a maze of old mining roads that climb from the Big Hole Valley to 10,000-foot passes. This loop connects Coolidge Ghost Town with Elkhorn Hot Springs via Baldy Mountain, passing dozens of abandoned mines and mill sites from the 1880s silver boom. The technical section over Baldy Mountain requires experienced drivers—loose rock, steep grades, and tight switchbacks demand respect, especially around the old Hecla Mine ruins at 9,800 feet.
Expert difficulty due to exposure and technical rock sections; modified 4WD with skid plates and recovery gear essential. The route is impassable November through May due to snow, and afternoon thunderstorms can make the high country deadly. Stock up on fuel and supplies in Wise River before starting this 65-mile adventure. What you get is solitude in genuine mining country, with camping spots overlooking the entire Bitterroot Range and hot springs to soak your bones at the end.
Trail Specs
| Difficulty | Expert |
|---|---|
| Trail Type | Technical 4x4 |
| Surface | Rock |
| Features | Camping, High Altitude, Historic, Remote |
| Length (miles) | 65 mi / 104.6 km |
| Duration | 2-3 days |
| Max elevation (ft) | 10150 ft |
| Best season | June-September |
| Minimum vehicle | Modified 4WD with skid plates |
| Nearest town | Wise River, Montana |
| Land manager | Beaverhead-Deerlodge National Forest |
| Permit required | No |
| Cell service | None |
| Water crossings | Yes |
| Dispersed camping | Yes |
| Start coordinates | |
| End coordinates | |
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Location
Trail Conditions
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Frequently asked questions
Can a stock Tacoma or 4Runner run the Pioneer Mountains Loop, or does it need to be built?
Stock rigs will get hurt here. You need a modified 4WD with quality skid plates, a lift, and all-terrain tires at minimum. Rocky shelf roads and loose high-altitude terrain punish low clearance — this is not a trail to test a bone-stock rig.
When does the Pioneer Mountains Loop actually open, and can late-season snow be a problem?
June through September is your window, but early June can still have snow blocking passes above 9,000 feet. Late September storms can close the high sections fast — don't push October without checking current conditions with Beaverhead-Deerlodge National Forest.
Do I need a permit to run this loop or camp in the area?
No permit required for the trail or dispersed camping on Beaverhead-Deerlodge National Forest land. Standard campfire restrictions apply during dry season — check with the Wise River Ranger District before you go.
What's the hardest section of the loop and what should I expect?
The exposed rocky ridge sections near the 10,000-foot mark are where this trail earns its Expert rating — loose rock, narrow shelf roads with serious drop-offs, and no room for error. Wheel placement matters here, and a recovery without a partner rig in that terrain gets ugly fast.
Is there reliable water on the trail, and how far is the nearest gas from the trailhead?
There are stream crossings on the route that can be used for water with proper filtration, but flow varies — don't count on any single source. Wise River has a gas station, but fuel up in Dillon or Butte before heading in; services in Wise River are limited and the loop itself is 65 miles of remote with zero resupply.
Trail track
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