Lost Lake Trail

Overview

A mellow, scenic loop near Tower Junction, the Lost Lake Trail serves up lily-pad views on a small backcountry lake, rolling sage meadows, and a quick geologic bonus at the Petrified Tree. When the full loop is open, plan on roughly 3.1 miles total with a moderate feel thanks to an initial climb that eases into gentler terrain. Wildlife is a real draw here—this is prime country for bison and elk, with occasional coyote sightings.

Route Snapshot

You can start behind Roosevelt Lodge or from the Petrified Tree parking area. Clockwise from the lodge, you’ll climb about 300 feet early, traverse west to Lost Lake, then contour to the Petrified Tree lot before looping behind the Tower Ranger Station, crossing a creek, and returning to the lodge. If time allows, tack on the short spur to Lost Creek Falls (about 0.5 mi round-trip). If parts of the loop are closed, a shorter out-and-back to the lake from Petrified Tree is often available—check trailhead signage the day you hike.

What You’ll See

Expect tranquil water framed by lilies at Lost Lake, open sage meadows, and forest pockets that stay pleasantly cool. The Petrified Tree is a standout: an ancient redwood preserved by past volcanic events—an easy add-on that gives context to Yellowstone’s fiery geologic story. Much of the broader landscape has also been shaped by glaciation, which carved and polished the region’s volcanic layers into today’s mix of benches and valleys.

Best Time to Hike

June through September is the sweet spot for dry tread and open access. Early summer can be buggy—bring repellent and consider starting at sunrise for calm air, easier parking, and soft light on the lake. Shoulder and winter seasons are possible when conditions allow, but expect snow or ice and plan traction or snowshoes accordingly.

Tips and Tricks

• Prefer a kinder climb? Hike the loop clockwise from Roosevelt Lodge so the steep is upfront and over quickly.
• If the Petrified Tree lot is full (it’s small), there’s overflow along the entrance pull-off—arrive early.
• This is shared with horses; step to the downhill side and stand still until riders pass.
• Total loop distance is about 3.1 miles; the waterfall spur adds roughly 0.5 mile. Out-and-back options from Petrified Tree vary with closures.

Safety and Wildlife

You’re in bear and bison country. Carry bear spray and know how to use it, make noise in brushy sections, and give all wildlife plenty of space. Bison often use the trail—never crowd or try to pass too close. Expect occasional creek crossings and some loose gravel on singletrack.

Worth It?

Yes—this is a low-effort, high-payoff loop that stays quieter than many Yellowstone hot spots, with a fun mix of wildlife potential and geology in a compact package. If you’re torn between short hikes nearby, this one’s a smart pick—especially if you add Lost Creek Falls and the Petrified Tree.