This is the hike to choose when you already know and like Sourdough / Bozeman Creek, but want the whole story instead of the neighborhood-walk version. The lower canyon is familiar and social. The upper miles become quieter, more committed, and more destination-driven.
Mystic Lake is not the biggest lake near Bozeman and it is not the most dramatic. Its strength is usefulness. It is close enough to reach from town, long enough to feel like an accomplishment, and flexible enough to work as a day hike, backpack, cabin approach, fishing trip, or winter ski objective. That combination is rare.
The Sourdough trailhead has a large parking area, but it is one of Bozeman's busiest local trailheads. Expect more cars than solitude at the start; the crowd thins as you continue toward Mystic Lake.
There is a bathroom at the Sourdough trailhead. The existing Sourdough / Bozeman Creek guide also notes another bathroom around 3 miles up the trail.
The first few miles are popular with hikers, runners, bikers, dog walkers, and skiers in winter. Past the common turnaround points, traffic drops off quickly.
The drive is quick from Bozeman and mostly paved, with a short gravel finish on Sourdough Canyon Road. The trailhead is generally reachable year-round.
Do not rely on cell service once you are deep in Sourdough Canyon. Download maps before leaving Bozeman.
Dogs do well on the Sourdough approach because there is shade and water, but the full lake hike is a big mileage day. Keep dogs under control around bikes, skiers, wildlife, and the lake outlet.
7 Miles from Bozeman, MT. 15 Minutes
From downtown Bozeman, head south on Church Avenue. Continue as it becomes Sourdough Road. Turn right onto Nash Road, then left onto Sourdough Canyon Road. Follow Sourdough Canyon Road to the Sourdough / Bozeman Creek Trailhead.
The trailhead has a large parking area and a short gravel approach. Google Maps link.
Bozeman Creek runs along much of the approach, and Mystic Lake is the destination. Bring a filter. Potable water is not available at the Sourdough trailhead or at Mystic Lake Cabin.
The lower route is wide old road grade. The shorter summer option on Mystic Lake Trail 457 is narrower singletrack after the 5-mile bridge area. In winter, Trail 454 is the preferred old-road route and may be groomed for cross-country skiing.
Wear comfortable trail shoes for summer day hikes. Bring layers because the canyon stays cool in shade and weather can shift near the lake. In winter, plan for cross-country skis or snowshoes on the old-road route.
Footwear: Trail Shoes
Pack this like a full-day hike: real lunch, salty snacks, and enough calories for a 7- to 10-hour outing. If you are backpacking or staying at Mystic Lake Cabin, plan meals around a long carry in.
Mosquitoes can be noticeable near Bozeman Creek and Mystic Lake in early summer. They are usually most annoying near still water and in the evening.
The canyon approach is shaded for long stretches. The lake basin opens up more, with a mix of meadow, shoreline, and forest.
Mystic Lake works well as an overnight. There are backpacking options near the lake, and Mystic Lake Cabin is a Forest Service rental for up to four people when you can snag a reservation.
No permit is needed for a normal day hike. Cabin stays require a reservation, and overnight users should check current Forest Service rules before heading in.
Sourdough / Bozeman Creek
Same trailhead, better choice if you want a shorter, pick-your-own-distance outing.
Mystic Lake Trail 457
The shorter summer singletrack option from near the 5-mile bridge to Mystic Lake.
Bozeman Creek Trail 454
The old-road route to Mystic Lake Cabin and the recommended winter approach.
New World Gulch Trail
A shorter but steeper alternate route to Mystic Lake from the Bear Canyon side.
Beartooth Publishing's Bozeman Area Map covers Sourdough Canyon, Mystic Lake Trail, New World Gulch, and the larger trail network.
Late June through September is the best window for the summer hike to Mystic Lake. The Sourdough trailhead is usable year-round, but the route choice changes with snow.
July through September: best odds of clear trail, warmer lake weather, and practical backpacking or cabin access.
Late May, June, and October: quieter, cooler, and potentially muddy or snowy in shaded upper sections. Bring layers and expect changing conditions.
Midwinter as a casual hike. The old-road route can be excellent for skiers and snowshoers, but the full cabin approach is a serious winter outing.
Plan around 18 miles round trip for a day hike. The exact distance depends on whether you use Mystic Lake Trail 457, the shorter summer singletrack, or stay on Bozeman Creek Trail 454, the longer old-road route.
In summer, most hikers should consider Mystic Lake Trail 457 from near the 5-mile bridge because it is shorter and more trail-like. In winter, Trail 454 is the recommended old-road route and may be groomed for skiing.
Bikes are allowed on the summer route network, but winter rules are different. When Trail 454 is groomed for cross-country skiing, bicycles and other wheeled vehicles are not allowed on that winter trail.
Yes. Mystic Lake has backpacking potential, and Mystic Lake Cabin is a Forest Service rental near the lake. Cabin reservations are separate from day hiking.
They are different hikes. Hyalite Lake has more scenery along the way, especially waterfalls. Mystic Lake via Sourdough is more gradual, closer to town, better for winter travel, and useful as a cabin or backpacking objective.
Yes. Mystic Lake is known for trout fishing, including rainbow and cutthroat trout. Bring a Montana fishing license and check current regulations before you go.
Plug 18 miles and 1,620 feet of elevation gain into our free hiking time calculator for a personalized estimate.