OLD Army pass (and the Cottonwood Lakes drainage) have a lot of lakes. About 6 miles to Muir Lake. You could make a good afternoon of it to find out where the lunkers are then try tempting them the second day. The Cottonwood Lakes used to be the only breeding area for Sierra Golden Trout. Barbless catch and release now. Check on other fishing regulations there, such as close of season. Its about a mile easy walk to South Lake or Long Lake (I heard not much good luck there this year at Long, however).
Old Army trail leaves up near lakes 3,4,and 5.
http://www.summitpost.org/route/156296/army-pass-normal-route.htmlI have heard that Soldier Lakes have a few fish.
For another route, over Kearsarge Pass, I watched a young lady pull about 20 trout out of the closest Kearsarge Lake, AFTER an early supper. But that (and Bullfrog) is about all the fishing you would have until Bubbs Creek and perhaps the lakes around Crabtree Meadows.