The Warm River has no gauge. The nearest is Henry's Fork near Ashton, below the confluence.
Forecast for Warm River
54°F Mostly Clear
- Tonight Low 34° Mostly Clear
- Monday High 63° · Low 38° Sunny
- Tuesday High 61° · Low 39° Slight Chance Rain And Snow then Partly Sunny
Forecast from the National Weather Service, updated 7:44 pm.
Latest reports
Fishing Report - August 14, 2026
Henry's Fork Anglers
Upper Henrys Fork: Flows in Box Canyon are currently 1012 CFS. Box Canyon has been fishing well, mostly nymphing and streamers producing, but if you felt compelled to fish a dry a small purple chubby chernobyl or a Henry’s Fork…
Fishing Report - July 10, 2026
Henry's Fork Anglers
UPPER HENRY’S FORK Box Canyon is fishing really well. Large PMD hatches midday as well as some lingering golden stones on top. Big, splashy rises in the riffles are likely fish feeding on PMDs and you can get them to…
Fishing Report - January 28, 2026
Henry's Fork Anglers
Late January around the Henry’s Fork looks a little different than usual this year. We’ve got very little snow on the ground, but don’t let that fool you—it’s still winter, and it’s been consistently cold for the past couple of…
Fishing Report - June 27, 2025
Henry's Fork Anglers
Upper River: Box Canyon is fishing well this time of year despite the high water. Flows are currently at 1400cfs—while 900cfs is ideal for wading, staying tight to the bank keeps things safe. Streamers are very productive whether hitting the…
Fishing Report - June 20, 2025
Henry's Fork Anglers
Upper River: They’ve let more water out of Island Park Reservoir this week and the increased flows have been a welcomed sight during the Harriman Ranch Opener! Box Canyon is at approximately 937 CFS which is a significant increase from…
Fishing Report - June 13, 2025
Henry's Fork Anglers
Upper River: With flows at 473 CFS below Island Park reservoir expect to bang a few rocks if you're floating down Box Canyon, the river is very low! The Golden Stones are fluttering about so a Gold Chubby, or Henrys…
