Confluence With North Fork San Joaquin River To Hells Half Acre river run
Confluence With North Fork San Joaquin River To Hells Half Acre
There are specific rapids and obstacles on this segment that require skilled navigation and scouting, such as Devil's Staircase, which is a series of steep drops and boulder gardens, and Hells Half Acre, which is a long and technical rapid with large boulders and narrow channels. Other rapids to watch out for include Suicide Falls, Chawanakee Rapids, and Upper and Lower Lumsden Falls.
The area is managed by the U.S. Forest Service, and visitors are required to obtain a permit for overnight camping. The Forest Service also recommends that visitors have experience in whitewater rafting and kayaking and be prepared for the remote and rugged terrain. Additionally, visitors must follow all Leave No Trace principles and adhere to fire restrictions and other regulations to protect the natural environment.
Overall, the Whitewater River Run Confluence with North Fork San Joaquin River to Hells Half Acre is a thrilling adventure for experienced whitewater enthusiasts who are prepared for the technical challenges and remote wilderness setting of this segment.
Plan your run down to the hour
Same weather feed Snoflo's iOS app uses -- updated continuously from NOAA / yr.no. Watch the precipitation column on the meteogram; rain ahead of a run typically lifts flows 12-48 hours later depending on the basin.
Next 5 days, hour by hour
Temperature line with weather symbols on top, snow + rain accumulation as columns, humidity as a dotted line.
5-day forecast table
Every 3 hours, broken out across temperature, snow, rain, humidity, and wind. Each cell is colour-coded relative to the column min/max.
| Time | Condition | Temp (°F) | Snow (in) | Rain (in) | Humidity (%) | Wind (mps) | Wind dir |
|---|---|---|---|---|---|---|---|
| Loading detailed forecast… | |||||||
15-day temperature & precipitation
Daily temperatures, snow, and rain projected over the next two weeks -- the upstream story that drives next week's flows.
Regional streamflow levels
USGS streamgauges around Confluence With North Fork San Joaquin River To Hells Half Acre -- useful for spotting upstream pulses and gauging which tributary is contributing what.
| Streamgauge | Discharge | View |
|---|---|---|
| Nf Willow C Nr Sugar Pine Ca | 416 cfs | → |
| Mf San Joaquin R Nr Mammoth Lakes Ca | 350 cfs | → |
| Big C Div Nr Fish Camp Ca | 0 cfs | → |
| Merced R A Happy Isles Bridge Nr Yosemite Ca | 848 cfs | → |
| Deadman C A Big Springs Nr Crestview Ca | 33 cfs | → |
| Merced R A Pohono Bridge Nr Yosemite Ca | 1,090 cfs | → |
Plan a longer trip
The closest boat launches, other paddle runs, and campgrounds so a day on the water can grow into a full weekend.
Boat launches
- Mammoth Pool Rd, California
- Huntington Boat Ramp & Launching Site
- Lake Edison Boating Site
- Florence Lake Boating Site
- Florence Lake Campground
Other river runs
- Rainbow Falls To Confluence With North Fork San Joaquin River
- Cora Creek To Confluence With San Joaquin River
- Hemlock Crossing To Confluence With Cora Creek
- Headwaters In Sec 8, T3s, R25 E To Hemlock Crossing
- Rainbow Falls To National Monument Boundary
Campgrounds
- Little Jackass Campground
- Little Jackass
- West Kaiser
- West Kaiser Campground
- Sweetwater
- Mammoth Pool Campground
Fishing spots
Parks
Whitewater safety
- Check the flow before you run
- Use the linked-gauge card and Regional Flow panel above. Class ratings change with flow -- a Class III at low water can become Class IV+ at high water.
- Know your skill ceiling
- Pick runs comfortably below your ceiling. Cold-water and big-water runs raise the consequences of any mistake.
- Wear the right gear
- Helmet, PFD, drysuit / wetsuit when water is below 60°F. Throw bag, knife, and whistle on your person, not in the boat.
- Scout, set safety, and run with a team
- Scout new rapids on foot, set safety with throw bags above the consequence pool, and run with at least one other competent paddler.
- Respect the river
- Strainers, undercuts, low-head dams, and wood can kill at any class rating. When in doubt, portage.
Set push alerts in the Snoflo app
Save Confluence With North Fork San Joaquin River To Hells Half Acre as a favorite, set a discharge threshold (e.g. "alert me when flow hits 600 cfs"), and the iOS app pushes the moment the linked gauge crosses.
About Confluence With North Fork San Joaquin River To Hells Half Acre
What's the optimal flow for Confluence With North Fork San Joaquin River To Hells Half Acre?
The optimal flow depends on the section and the craft. Check the Run Details panel for the linked gauge and current status.
How fresh is the cfs reading on this page?
The linked USGS streamgauge reports continuously (every 15 minutes); Snoflo refreshes throughout the day. Hover the streamflow sparkline to read individual datapoints.
What's the whitewater class?
See the Run Details panel for the class rating Snoflo tracks for this run. Class ratings change with flow -- a Class III at low water can become Class IV in high water.
Where do I put in / take out?
Tap Directions in the hero above to open driving directions to the put-in. For shuttle planning, check the Nearby Boat Launches panel and the river run operator's site.
Can I get alerts when flows hit the optimal range?
Yes -- alerts are managed in the Snoflo iOS app. Favorite this run, set a discharge threshold, and you'll get a push the moment the gauge crosses.
Other runs near here
Snoflo-tracked paddle runs within driving distance of Confluence With North Fork San Joaquin River To Hells Half Acre.