Mount Tom (from Horton Lake) is a 14 mile out and back trail located near Bishop, CA. The trail is primarily used for hiking and rock climbing. Dogs are also able to use this trail.
Took the mining road up to the lake to camp, then kept going up it to the mine at the end of the tram and started climbing the scree to the top. A few cairns show some route, but it's generally a choose your own adventure. The mine and tram workings were interesting to poke around. Snow and ice kept us from going anywhere dangerous around what appear to be vertical shafts. Stopped by more mine workings in Hanging Valley, but hard to see much under the snow.
Nice trail passing along a beautiful meadow about a mile in. About half way to Horton lake lower is an old mining cabin that sits along a stream full of Brooke trout. About four miles in we arrived at the lower lake. It's a great little lake with awesome scenery everywhere. The trail to the summit is moderate until about 12,400. From here there is not a trail really and a lot of scrambling. We chose the western ridge to climb and it worked out. Once at the top (13,652) the views are endless. To ascend we chose one of the many chutes. This is tricky because of the loose rock. From Horton lake lower (where we camped over night) the hike to the summit took about 4 hours and two hours back to the lake. Permits required. Great hike.