FloatETA estimates how long this float actually takes from live discharge at USGS 13046000 (Henrys Fork nr Ashton), not a guidebook average. At a typical 1,800 cfs, a raft drifts about 3.0 mph here. Higher flow speeds you up; skinny water slows you down. Kayaks run faster than the current, tubes slower. Optional fishing adds 35 minutes per mile.
The Henry's Fork (Ashton) listing covers 18 river miles across 2 access-to-access stretches (Class I). Times in the table are typical raft hours at that reference flow. Open the live calculator for today's CFS, sunset take-out, water temperature, and rain/UV at the put-in.
See today's Henry's Fork (Ashton) float time
Float stretches on the Henry's Fork (Ashton)
| Put-in → take-out | Miles | Difficulty | Typical raft time | Notes |
|---|---|---|---|---|
| Warm River Campground → Ashton (Vernon area) | 8 mi | Class I | ~2 hr 40 min | Put in below Mesa Falls. Do not launch above the falls. Gentle gradient, watch for diversion dams near Ashton. |
| Vernon Bridge → St. Anthony | 10 mi | Class I | ~3 hr 20 min | Valley miles toward the Snake confluence. Irrigation can skinny this stretch in late summer. |
How we time this river
Speed scales with discharge using hydraulic geometry v ∝ Q0.34, calibrated to this gauge. That is why a 1,000 cfs afternoon is a different day than 3,000 cfs runoff. Always scout, wear a PFD, and check Idaho Fish and Game for closures. Gauge page: USGS 13046000.
Common questions
How long does it take to float Warm River Campground to Ashton (Vernon area) on the Henry's Fork (Ashton)?
About 2 hr 40 min in a raft at a typical 1800 cfs. Kayaks run a bit faster; tubes run slower. Stopping to fish adds about 35 minutes per mile. Put in below Mesa Falls. Do not launch above the falls. Gentle gradient, watch for diversion dams near Ashton.
How long does it take to float Vernon Bridge to St. Anthony on the Henry's Fork (Ashton)?
About 3 hr 20 min in a raft at a typical 1800 cfs. Kayaks run a bit faster; tubes run slower. Stopping to fish adds about 35 minutes per mile. Valley miles toward the Snake confluence. Irrigation can skinny this stretch in late summer.
What USGS gauge is used for Henry's Fork (Ashton) float times?
FloatETA uses USGS gauge 13046000 (Henrys Fork nr Ashton) for live discharge. Speed is scaled from a reference 1800 cfs drift of about 3.0 mph.
Is the Henry's Fork (Ashton) a good tube float?
Tubes lag the current (we use a 0.72× speed multiplier). On Class I–II stretches tubes can work at moderate flows; skip high water and always wear a PFD.