Crescent Lake-High Lake

Overview

This is Yellowstone’s quieter, big-mile alpine lake tour in the Gallatin Range—a backcountry loop that links Crescent Lake and High Lake from the Specimen Creek Trailhead. Expect long miles, real solitude, and classic cirque scenery. The full loop is roughly 21 miles total with sustained climbing and some steep switchbacks. Many hikers split it into an overnight to actually enjoy the lakes instead of racing the clock.

The Experience

Follow Specimen Creek up-valley through broad meadows and timber to a junction about 6 miles in, then turn toward Crescent and High Lakes. Crescent Lake sits around 7.5 miles from the trailhead in a glacial basin—its water turns striking turquoise in summer, and it can ice over in the shoulder seasons. From there, continue higher toward a ridge along the park boundary to reach High Lake. The terrain mixes mellow creekside walking with steeper, switchbacked climbs and big-open views as you approach the lakes. A designated campsite sits right along the shore at the south end of High Lake—scenic if you’re backpacking.

Conditions and Difficulty

Snow can linger into summer at these elevations. Even in warm months you may cross snow patches that obscure the tread, so navigation can get tricky—especially on or after storms. The miles are honest: long, moderately steep, and at elevation. Reliable water flows along Specimen Creek, but expect wet feet or muddy stretches early season. Fresh bear tracks are not uncommon in this drainage; carry bear spray and know how to use it.

Wildlife and What to Notice

You’re in prime bear country (both grizzly and black bear). Elk and mule deer work the meadows, and birders might flush ruffed grouse from the understory. Geology-minded hikers will recognize the classic glacial story: U-shaped valleys, moraines, and tarns (Crescent and High) carved during the Pleistocene.

Best Time to Hike

July through September is the reliable window. Earlier, expect lingering snow and higher creek levels; later, early cold snaps can ice the lakes. Start early for calm water reflections at Crescent and High and better wildlife viewing in the meadows. Mosquitoes can be intense mid-summer around Crescent—pack headnets and repellent.

Logistics and Tips

• Start/park at the Specimen Creek Trailhead on US‑191 and follow Specimen Creek upstream to the lakes junction.
• Overnight trips require a Yellowstone backcountry permit and use of designated campsites; plan ahead in peak season. Dogs are not allowed on this trail.
• Bring a solid map/track. If snow lingers, bright markers or flagging on your pack can help your group relocate each other in open patches.
• Trekking poles help on creek fords and long descents.

If you want a shorter taste of the area, an out-and-back to Crescent Lake makes a satisfying (but still strenuous) day. For a bigger multi-day, some parties link this area with Sportsman Lake for a longer Gallatin loop.