Yosemite National Park offers a quality trout fishing experience with an absolutely stunning wilderness backdrop. Those 16 or older are required to have a California fishing license. The Non-resident annual sport fishing license is rather pricey at around $100. For residents it's $37. The short term non-resident licenses seem like the better bet for those visiting Yosemite from out of state. You can get more information on how to purchase a California fishing license from this site. Also, you can purchase licenses and fishing equipment from various shops in and around Yosemite.

Stream and river fishing begins on the last Saturday in April and continues through November 15th. Frog Creek does not open until July 15th in order to protect spawning rainbow trout.

Lakes and reservoirs are open all season long. Yosemite Valley fishing is open to catch and release only. No alive or dead minnows, eggs, or other baitfish may be used in Yosemite National Park. Fishing from docks and bridges is also prohibited.

Yosemite is home to feisty rainbow trout and brown trout. Due to the cold and relatively infertile water, Yosemite National Park's waters lack the nutrients of the more famous trout streams in Yellowstone. This means the fish will likely be less choosy at what you are offering. Medium sized bushy attractor flies should work on the rivers. Muddler minnows and streamers fished from rocky points on the shores of lakes should work as well.