West Coast
San Joaquin River (Upper)
Gauge data unavailable for San Joaquin River (Upper).
Check USGS directly ↗
24-Hr Pressure
27.28 inHg · → High/stable
Local Weather
Tough conditions — fish deep
Today
☀️Clear sky
83° / 62°
Tomorrow
☁️Overcast
86° / 66°
Wed
☁️Overcast
88° / 67°
Thu
☀️Clear sky
89° / 67°
Cold front incoming — go deep with nymphs, surface activity likely slow.
Weather by Open-Meteo · No API key · Updated every 30 min
What should I fish today?
One call. Specific to today's exact conditions on the San Joaquin River (Upper).
Time of Day
What should I pack?
Rod, flies, tippet, and safety gear specific to today's San Joaquin River (Upper) conditions.
🪰 Hatch Calendar
San Joaquin River (Upper) · June · Early Summer
Showing typical dates — water temperature data unavailable for live hatch predictions.
Select month
SALMONFLY (size 6-8) BEGINNING when flows allow. Golden Stones. PMDs (size 14-16). Caddis. Backcountry season opens.
River Map
About San Joaquin River (Upper)
The upper San Joaquin River above Mammoth Pool Reservoir flows through a spectacular granite canyon in the Sierra Nevada. Wild rainbow and brown trout inhabit the cold, clear water, with upper wilderness sections offering remote backcountry fishing. The lower accessible sections near North Fork provide roadside access for day anglers.
Regulations
Live CFS data unavailable — no road-accessible USGS gauge on the wilderness sections. General season regulations apply above Mammoth Pool. Wilderness sections may require a wilderness permit for camping. California Sport Fishing License required.