Shoshone Lake via Lewis River Channel

Overview

This is the classic forest-and-lakeshore day hike that reaches the marshy south edge of Shoshone Lake—the largest backcountry lake in the Lower 48 with no road access. The Lewis River Channel Loop is an 11.0-mile total circuit with about 577 feet of gain. Expect lodgepole pine forest, a mellow river corridor, and big-water views where the loop brushes the lake’s south shore. There’s also a similar 10.8-mile total out-and-back from the same trailhead if you prefer to skip the loop.

What You’ll See

You’ll move through long stretches of lodgepole, then open up near the Lewis River Channel before meeting the wild, marshy south shore of Shoshone Lake. It’s a quieter corner of the park; odds are good you’ll hear more wind and water than people. This is bear country—both grizzly and black bears frequent the area—and the broader Yellowstone herd means elk and bison sign are common.

Trail Feel and Tips

The loop is generally moderate, but it can feel longer than the mileage suggests thanks to repetitive forest sections. Bugs can be intense in early summer—late June has a reputation for brutal mosquitoes—so wear long layers, treat clothing, and bring a head net and strong repellent. Trekking poles are handy for balance in wetter sections by the lakeshore.

Regulations and Safety

No pets on this trail, period. If you’re pushing farther on a multi-day route that fords the Lewis Channel, be conservative—park waters are cold and swift, and conditions change fast. If you’re tempted by the paddling approach to Shoshone via Lewis Lake and the channel, plan carefully: boating permits, aquatic invasive species inspections, and strong afternoon winds on the lake are all real factors. For any overnight backcountry trip, you’ll need a permit and to follow strict food storage rules.

Best Time to Hike

Late June through September is typical. June often means lingering wet stretches and peak mosquitoes; July improves but can still be buggy; August usually offers the calmest experience with fewer bugs and lower, easier water nearby. Start early for cooler temps, quieter trail, and softer light along the lakeshore.