Welcome back run off!!! Tioga pass opened up so access to the park is fully open. Be aware that traffic in the valley is really rough due to the bus lanes that no longer allow cars in the rt lane of traffic. That being said most “South facing” tributaries are fish-able, fish the edges, and check flows and weather before you come.
Mokelumne- Closed till end of May.
Stanislaus- Spring pulses are way up… flows up to 3200 to 1200 CFS on Sundays and lessening by Thursday they should start back down by the middle of the month. Best to go high above the run off just below snow line. Look at the South Fork till run off is down, hard to fish the South Fork above 600cfs. The Hwy 4 corridor is not hot.
Tuolumne- Run off is the issue the middle section tributaries like the South fork are a good choice for the spring. Subsurface caddis & midges work well.
Merced- Still very heavy flows through El Portal. Look to Rock Creek in the Sierra National Forest as a good southern spring tributary to fish. Open and with a recent release of rescue rainbow trout it is looking better. Lots of Pike Minnows, Suckers, and when you catch a rainbow with a tracking tag on it know it is a rescue fish and keep it in the water.Below Yosemite has very high flows, fishing the edges are possible but there are better options.