by AlmostThere » Thu Jul 10, 2014 6:39 am
The Yosemite website will have a list of full trailheads and information on how to get a permit. You will be extremely lucky (as in, enter the lottery too if you get a reservation) to get a permit reserved for popular trailheads off Tioga Road.
Sierra North (a guidebook) has a lot of good suggestions for hikes in this area. Don't limit yourself to Yosemite. There are plenty of great loops outside it. You would have a higher probability of getting a permit in Ansel Adams Wilderness and there are great destinations - going in via Agnew, visiting Thousand Island, Garnet, Nydiver, Ediza Lakes, and coming out Reds Meadow would also give you options for getting shuttles back into Mammoth to your car at the end. From the west side, more remote and less popular, a permit can be gotten at Clover Meadow (end of Beasore Road out of Bass Lake) for Cora Lakes - loads of exploring in granite out that way.
When I want to fish - I don't plan to go to Yosemite. They do not plant the lakes any more and most lakes are quite small, thus the fish are also small, and usually brook trout which tend to overpopulate and then become very skinny. You should plan to leave salmon eggs and live bait at home (live bait is prohibited in the park anyway) and use flies and spinners, which work well. Note that in many waterways in the parks, you are limited to catch and release - barbless single hooks. No fish feeds in the Dana Fork of the Tuolumne, the Merced River, or any other Wild and Scenic River.
If you walk up to a lake and you can see the rocks in the bottom all across the lake - there won't be fish. Shallow lakes that freeze to the bottom in winter stay fishless. The Forest Service and the Park Service are also gillnetting and poisoning the fish out of a lot of the high lakes to make them available to the yellow legged from - the fish up high are all planted, the frog is/was indigenous and so they are hoping to bring back the frogs in much of their old habitat. A short list of fish kill lakes for Yosemite: Upper Mattie Lake and nearby unnamed ponds; Virginia Lake, Bartlett Creek lakelets, Roosevelt Lake, Middle and Tiny Mc Cabe Lakes, Hutchings Lake.
If your priority is truly fishing, I would send you into Dinkey Lakes via Courtright - Courtright is planted and full of good sized trout. Spending a few days backpacking into Dinkey would get you rainbows, golden-rainbow hybrids, brook trout of decent size, and then camp a day at Courtright when you get back to the trailhead and fish from the shore near the dam for 3 lb rainbows and kokanee. Or, for a more remote experience - go out of the Maxson trailhead on the east side of Courtright and go into Red Mountain Basin, Bench Valley, Blackcap Basin, and fish the high lakes - great fishing in many of these high, deep lakes full of trout. You will especially enjoy this if you are any good at cross country navigation - alpine navigation off trail is fairly straightforward. The trails are not so well maintained but the solitude and the fishing are excellent. And the permits are gotten from Sierra National Forest, and much easier to obtain.
Do some research on these locations at High Sierra Topix, and read in the fishing forum there.