Tuolumne, Middle Fork
Dimond O
| Difficulty | III-IV+(V) |
| Length | 4.1 mi |
| Avg Gradient | n/a |
| Reach Info Last Updated | April 29, 2025 |
River Description
A 4 mile run not far outside the Yosemite Park boundary with relatively easy access for the Sierra's. High clearance is recommended for the shuttle.
The section above the day use area is mostly bouldery rapids, while the section below has more bedrock. Just below the day use area is the marque drop, a fun slide with some avoidable rooster tails.
Downstream of the Dimond O campground a set of fun ledges lead to a short gorge with a class V rapid at the end. Be careful here, at low water (150 cfs) there was an easy to catch, but hidden from upstream view eddy on river-left near the lip of the rapid/horizon. It is unclear if this eddy will be available at higher flows.
The rest of the run is all scoutable and portageable with relative ease, with many fun class IV rapids and a few IV+.
River Features
Spur Rd Parking
Park at this point on a spur road off of Forest Rd 1532
Put In 1/2 mi downstream of Yosemite Park boundary
You will know you reached the river in the right spot if there are a couple nice bedrock slides in the 5-10' range.
Abernathy Meadow Take Out
Take out using a short trail to access a spur road SE of Abernathy Meadow.
Trip Reports
Log in to add a reportJuly 15, 2023
Trip Report:
http://mthoodh2o.blogspot.com/2025/03/mf-tuolumne.html
We thought this was a good run with relatively easy access and lots of fun class IV-IV+ rapids. There was a mix of bedrock and bouldery rapids.