Teton River, Idaho

Upper valley: Victor to Driggs

The Teton begins as spring creeks and tributaries near Victor and flows north through farmland, so the upper river is slow, clear, weedy meadow water reached from county road bridges rather than forest roads. Long leaders, small dries and a low approach are the price of admission. Yellowstone cutthroat are the main fish here.

Lower valley: Driggs to Tetonia

Below Driggs the river gathers Teton Creek, Leigh Creek and other Teton Range streams and gets big enough to float. Rainbows and hybrids become more common, browns hold in the deeper bends and whitefish are everywhere. Wind is a constant in the open valley.

The canyon below Highway 33

Past the Highway 33 bridge near Tetonia the river drops into Teton Canyon, a basalt gorge with limited rim access on rough roads and steep scrambles to the water. This is where the Teton Dam failed in 1976. Browns and rainbows dominate the canyon and nymphing outfishes dries in the broken water; a raft or small boat is the practical way to cover it, and it is not beginner water.

Yellowstone cutthroat

Idaho Fish and Game manages the Teton for its native Yellowstone cutthroat, not the fine-spotted Snake River form. They are the reason for the catch-and-release rule. PMDs and yellow sallies in July, green drakes and hoppers in August, and tricos, mahoganies and baetis into the fall are the hatches; guides describe a typical upper-river fish at 12 to 16 inches.

Rainbow and brown trout

Rainbows and cutthroat-rainbow hybrids threaten the native fish through competition and interbreeding, so IDFG has removed the limit on rainbows and hybrids in the Teton and asks anglers to harvest them. Browns run the deeper valley holes and the canyon and respond to streamers when nothing is rising.

Season and regulations

Runoff peaks in late May and June, when the Driggs gauge can run above 1,000 cfs; by July the valley is back in shape. Wild Water Fly Fishing, which guides the river from Victor, puts ideal wade fishing at 150 to 400 cfs, with the river thin below 150 and difficult above 500. This page compares the gauge above South Leigh Creek near Driggs to that range. September through November runs low and stable for technical dry fly fishing.

Under the 2025 to 2027 Idaho rules the Teton River itself is open all year with no harvest of cutthroat trout and no limit on rainbow trout or hybrids; the tributaries, including Bitch, Badger, Canyon, Fox, Trail, Teton and South Leigh creeks, are closed June 1 to 30 for spawning. Confirm the Upper Snake rules with IDFG before you go.