For backpacking enthusiasts, the unparalleled joy of venturing across a secluded, unmarked mountain pass leading to pristine subalpine lakes teeming with trout is a treasure. In the vast mountain ranges of Montana, this dream is easily achievable, especially within the eastern Pioneer Mountains. While logistically straightforward, the physical demand of ascending nearly a thousand vertical feet within a mile’s horizontal span is a significant challenge, regardless of fitness levels. Montana, blessed with millions of acres of public land and countless subalpine lakes, serves as an ideal playground for those seeking solitary trails and abundant trout-filled waters. Among the numerous mountain ranges, the eastern Pioneer Mountains consistently beckon me back for repeated explorations.
The Solitude and Scenic Wonders of the Pioneer Mountains
During a recent backpacking trip in mid-September, I traversed eight different lakes – seven of which held fish, and six where I successfully fished – and crossed two stunning mountain passes. One pass featured a barely discernible trail, while the other demanded cross-country navigation through open subalpine woodland. Despite Montana’s expansive wilderness and sparse population, I encountered only one other group throughout my three-day journey. At five of the lakes I visited, including one where I camped overnight, I enjoyed complete solitude. In an age where permits and visitor quotas are increasingly common, diminishing the opportunities for secluded experiences on public lands, such a peaceful trip during peak season feels incredibly fortunate. Yet, in the Pioneer Mountains, this type of serene experience is more the norm than an exception, at least in my personal encounters.
Lacking the widespread recognition of Montana’s renowned Glacier and Yellowstone National Parks, the Pioneer Mountains remain off the typical tourist radar. Nestled in the southwestern region of the state, away from major population centers, the Pioneers are primarily enjoyed by local residents and dedicated backpackers and hikers familiar with maps and seeking exceptional wilderness experiences. While not officially designated as wilderness, the eastern Pioneer Mountains predominantly feature non-motorized and non-mechanized trails, reserved for foot and equestrian travel. The western Pioneers, characterized by lower elevations and gentler landscapes, see more motorized and mechanized use but still offer fantastic hiking and backpacking opportunities. The main trails within the Pioneers are remarkably well-maintained, often featuring gentle slopes and excellent trail surfaces, with steeper sections leading up to certain lakes being notable exceptions.
With a high concentration of mountain lakes, typically situated between 8,500 and 8,950 feet in elevation and in close proximity to one another, the eastern Pioneer Mountains are particularly appealing to backpackers who enjoy fishing. Many lakes have been stocked in the past, with some continuing to receive regular stocking, primarily with cutthroat and rainbow trout, or their hybrids. Catching trout in the 12-14 inch range is common in many of these lakes, with some harboring even larger specimens. From my experience, the trout in these high mountain lakes can exhibit wildly varying behavior, from aggressively striking at any fly to becoming incredibly selective and unpredictable. This can even fluctuate between lakes on the same day. Given the close proximity of many lakes, a shift from a fruitless fishing spot to a highly productive one might be just a short mile hike away.
While pleasant campsites can be found along creeks and within forested areas bordering meadows, the most desirable campsites are generally located by the lakes. Many offer ample tree cover for wind protection while still allowing you to immerse yourself in the subalpine scenery, complete with impressive views of talus slopes ascending towards dramatic cliffs and towering peaks. Several passes, easily accessible from the lakes, provide breathtaking panoramas. Although routes to summit peaks are less defined and may involve considerable scrambling or navigating unstable talus fields, hiking up to these passes, even without crossing them, is a worthwhile side trip from any lakeside campsite.
Although the Pioneer Mountains may not be known for extensive loop trails, backpackers will find immense satisfaction in out-and-back trips to any of the lakes. Distances on the trail often feel shorter than they appear on maps, a pleasant and unusual characteristic. Utilizing a shuttle can enhance trip enjoyment, especially considering the relatively short distances between trailheads along the Wise River Scenic Byway. A bike shuttle is also a feasible option for certain routes, provided the necessary time and energy are incorporated into your planning.
Plan Your Pioneer Mountains Adventure
Essential Information
Hiking and backpacking in the Pioneer Mountains do not require permits, though regulations concerning group size and length of stay are in effect. For detailed guidelines, please consult the Beaverhead-Deerlodge National Forest website.
Ideal Visiting Time
The optimal period for hiking in this region extends from late June to mid-October. Early in this timeframe, expect potential snow cover on mountain passes and lingering snow around higher lakes, some of which might remain partially frozen. Later in the season brings the chance of colder nights and early snowfall. Mosquitoes can be intensely prevalent for several weeks in July and August, although this period often coincides with peak wildflower blooms. August and September generally offer favorable weather and excellent fishing conditions in the mountain lakes.
Directions to the Trailheads
The Pioneer Mountains are most commonly accessed from Interstate 15 near Dillon, MT. The western side of the eastern Pioneers and the eastern side of the western Pioneers are reached via the Wise River Scenic Byway, located between the small towns of Wise River and Polaris, MT. Trailheads on the western side of the western Pioneers are accessible from Montana Highways 278 and 43, near Wisdom and Jackson, MT.
Maps and Resources
The Beaverhead-Deerlodge National Forest (Central) map provides a helpful overview of the area for initial route planning, although it is not topographical. For detailed navigation, printing specific area maps from Caltopo or similar online resources is recommended. For in-depth information, “Exploring Montana’s Pioneer Mountains” by Leroy Friel is a dedicated guide. “Hiking Montana” (a Falcon Guide) and “100 Classic Hikes: Montana by Douglas Lorain” also feature select hikes within the Pioneer Mountains.
