Sentinel Meadows Trail

Overview

Sentinel Meadows is a mellow, mostly flat wander through Yellowstone’s backcountry geyser country. The classic route is a 3.5-mile total out-and-back with about 150 feet of gain, best for hikers who want wide-open meadows, steaming springs, and real chances to see bison without the elbow-to-elbow boardwalk scene. Expect peace and big sky more than big drama.

Route and Options

Start from the end of Fountain Flat Drive, cross the bridge over the Firehole River, and pick up the trail just beyond. Early on you’ll see Ojo Caliente boiling beside the river. Continue into broad grasslands toward the remains of Queen’s Laundry—an unfinished 1880s bathhouse beside colorful hot springs. That’s a natural turnaround for the 3.5-mile out-and-back.

Want more? You can extend into loop variations via Imperial/Imperial Meadows and the Fairy Falls Trail (roughly 4.7–5.1 miles total), or go big by linking Fairy Falls, Imperial Geyser, and even Grand Prismatic Overlook for a 9–13 mile day using nearby connectors. The old Fountain Freight Road segment doubles as a bike route, but bikes aren’t allowed on the singletrack into the meadows.

What You’ll See

This is geothermal country minus the fences—steaming vents, sinter mounds, and hot springs with vivid microbial mats. Wildlife is a highlight: bison herds commonly graze the meadows, coyotes are around, and you may spot elk sign and smaller critters like pika. In season, wildflowers pepper the grasslands.

Trail Feel and Tips

The tread can fade across open meadow; watch for orange markers and stay on established paths—thin crust in thermal areas is a real hazard. Parts of the meadows get wet, muddy, or marshy, especially early season, and you may hit minor creeklets. Sun exposure is constant; bring water and sunscreen. Bison sometimes park themselves on the trail—give them a very wide berth or turn back. Carry bear spray and know how to use it. An on-route backcountry campsite junction (“OG1”) exists; from Fountain Flat, keep left on the main path.

Best Times to Hike

May through October is the sweet spot. Early season brings mud and standing water; mid-summer means strong sun and great wildflowers; fall offers crisp air and excellent wildlife viewing. Start early for cooler temps and calmer wildlife patterns. If you mainly want a waterfall on good tread, Fairy Falls is the more defined, busier alternative; for solitude and geyser-basin vibes, Sentinel Meadows wins.

Essentials

• Length: 3.5 miles total (out-and-back to Queen’s Laundry area). Loop variants 4.7–5.1 miles; big linkups 9–13 miles.
• Elevation gain: ~150 feet; largely flat.
• No dogs. Standard park regulations apply.
• Off-trail hiking in hydrothermal areas is prohibited.