St. Joe River Fishing Guides and Conditions, Idaho

About the St. Joe River

The St. Joe rises in the Bitterroot divide country on the Idaho-Montana line and runs west about a hundred and forty miles through the Panhandle to Coeur d’Alene Lake, and the upper half of it is one of the most consistent wild cutthroat fisheries in the interior Northwest. The USGS gauge at Calder sits on the middle river and reports discharge and stage; there is no water temperature series, so summer thermal decisions are made on air temperature and time of day. Above Avery the river carries a Wild and Scenic designation and the character changes to pocket water and boulder gardens.

The fishery is built almost entirely on native westslope cutthroat trout, protected by catch-and-release regulations through most of the river and remarkably willing to eat a dry fly. Fish in the twelve-to-sixteen-inch range are the norm, with larger ones in the deeper canyon pools. Bull trout are present and fully protected, mountain whitefish are abundant and fish through the cold months, and a few rainbow and brook trout appear in the lower reaches. This is not a numbers-and-size river in the tailwater sense; it is a wild-fish river with a long, gentle dry fly season.

Guides run the St. Joe as a raft and drift-boat float from around Avery down through Calder toward St. Maries, with wade trips on the upper river above the floatable water. The road follows much of the corridor, so access is unusually good for a river this remote-feeling, and a great deal of the fishing is done on foot from pullouts. Outfitters in St. Maries, Avery and Coeur d’Alene run the water through a season that generally opens after runoff in late June.

Runoff is the governing factor. The St. Joe is entirely free-flowing and snowmelt-driven, running high and cold well into June in most years and dropping into ideal float and wade condition by early July. Low, warm late-August flows can push anglers to fish mornings only. Idaho licenses are required, the catch-and-release and tackle rules vary by reach, and the state regulations linked below spell out which section carries which.

Access

Calder river access at the USGS gauge - middle river launch and the flow reference.
Avery access - the standard upper put-in for float trips.
Huckleberry and Tumbledown campground accesses - roadside wade points on the middle river.
Marble Creek confluence access - lower float section entry.
St. Maries city access - the bottom of the guided range near the lake.
Forest Road 50 pullouts above Avery - walk-in wading on the Wild and Scenic upper river.
Red Ives area accesses - remote upper river headwater wading.

Seasons

Spring: snowmelt runoff keeps the river high and unfishable through most of May and into June.
Summer: the main season, opening after runoff with dependable dry fly fishing from July through August.
Fall: excellent September fishing as flows steady and cutthroat feed heavily before winter.
Winter: cold and largely inaccessible, with whitefish the only realistic target on open days.