Length: 2-19 miles, depending on turnaround point (the bridge at 4.5 miles is the most popular turnaround)
Duration: 30 minutes to all day
Difficulty: Easy to moderate
Elevation Gain: 40 to 1,552 feet
Activities: Hiking, mountain biking, trail running, cross-country skiing, fishing, camping
Crowds: Heavy traffic
Bozeman Creek Trail (a.k.a., Sourdough Canyon) is an old logging road that parallels Bozeman Creek. The trail's proximity to town and easy grade make this a popular destination. As an out-and-back, the distance is up to you: take a short jaunt, or hike the full 9 miles to Mystic Lake, where the trail officially ends. If you plan to head to Mystic Lake, bring a rod for brook, rainbow, and cutthroat trout and consider reserving the Mystic Lake Cabin for an overnight stay.
In winter, Sourdough is groomed by the Bridger Ski Foundation, making for a fun skate or cross-country ski. Be aware of hunters in the fall if you continue toward Mystic Lake. You can still hike it in the winter; just be cognizant of skiers. Always pick up after your dog as this creek supplies a portion of Bozeman's drinking water.
From Kagy Blvd. & S. Church Ave., head south on Sourdough Rd., eventually turning right onto Nash Rd. Make a quick left onto Sourdough Canyon Rd., and continue to the parking lot and trailhead.