Upper San Joaquin River (Wilderness Sections)
river in California
Offers an unparalleled wilderness fly fishing adventure in the heart of the Sierra Nevada.
What's working on Upper San Joaquin River
- 01Upper San Joaquin River entering prime fall fishing conditions.
- 02Blue-Winged Olive (BWO) hatches are strong; PMD activity is tapering.
- 03October Caddis emergence is a key event for fall dry fly fishing.
- 04Subsurface fishing with midges and nymphs remains highly effective in cooling waters.
- 05Water temperature is 42°F, with clear skies and a light breeze.
What to tie on
Picked from reports, hatches and the season. Tap a fly for the recipe and where else it works.
PMD (Pale Morning Duns)
Pale Morning Duns are actively hatching in fall, providing a key food source for opportunistic feeders.
Zebra Midge
Midges are a primary and consistent food source year-round, becoming even more important in cooler fall water temperatures for subsurface feeding.
Buy at AmazonMidge Larva
Midge larvae are a year-round staple, particularly in colder fall conditions when trout feed heavily on subsurface insects.
Buy at AmazonBlue-Winged Olive Comparadun
Fall BWO hatches are returning, making this a crucial pattern for selective trout feeding on emergers and adults.
October Caddis
Fall brings the largest caddis hatch of the year in many western rivers, making this dry fly essential.
Pheasant Tail Nymph
Pheasant Tail Nymphs are effective year-round, especially during fall BWO periods when mayfly nymphs are active subsurface.
Buy at AmazonWoolly Bugger (Olive)
This versatile streamer imitates leeches and baitfish, which are consistent food sources for predatory trout, especially as water temperatures cool in the fall.
Where to fish and who to ask
Florence Lake Trailhead
Starting point for hikes into the remote upper San Joaquin drainage.
Vermilion Valley Resort Access (for upstream areas)
Gateway to wilderness trails leading to the upper river.
Fly shops within 40 miles
Sierra Trout Magnet Fly Shop
Get Upper San Joaquin River (Wilderness Sections) reports by email
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California season by season
What changes on the water through the year, with the flies for each season.
Read before you go
Winter Fly Fishing: Essential Cold Weather Tips & Tactics
Master winter fly fishing with proven cold weather strategies, gear selection, and tactics for catching trout when temperatures drop.
Fly Line Types Guide: WF, DT, Running & Shooting Heads
Master fly line selection with our comprehensive guide to weight forward, double taper, running lines, and shooting heads for every fishing situation.
Best Fly Fishing Sunglasses: Lens Color & Polarization Guide
Master lens color selection and polarization technology for superior vision and fish detection on the water.
Fly Fishing Nets – Rubber vs. Nylon & Why It Matters for Fish
The net you choose dramatically impacts fish survival. Here's why rubber nets are superior to nylon for catch-and-release success.
Best Budget Fly Fishing Combo Setups for Beginners
Expert guide to affordable fly fishing combos that won't break the bank but deliver quality performance for new anglers.
Fly Fishing in Yellowstone National Park – Regulations & Best Waters
Master Yellowstone's world-class trout waters with essential regulations and top fishing spots for unforgettable angling experiences.
Quick answers
Common questions about Upper San Joaquin River (Wilderness Sections).
What flies work best on Upper San Joaquin River (Wilderness Sections)?
Our top scored fly patterns for Upper San Joaquin River (Wilderness Sections) right now are PMD (Pale Morning Duns) (80% confidence), Zebra Midge (80% confidence), Midge Larva (80% confidence). These picks are scored from recent fishing reports, hatch data, and seasonal patterns.
What fish species are in Upper San Joaquin River (Wilderness Sections)?
Upper San Joaquin River (Wilderness Sections) holds California Golden Trout, Rainbow Trout. See the species links on this page for fly recommendations and seasonal behavior for each.
Is Upper San Joaquin River (Wilderness Sections) fishing well right now?
We publish a fresh bite report for Upper San Joaquin River (Wilderness Sections) each week based on recent on-the-water intel. The current report — with conditions, hatches, and what's producing — is on this page.