Arc Pass (12,880 ft) in the Sierra Nevada is on the South side of the cirque surrounding Mt Whitney, and has a stunning view of Mt. Whitney. Here is a map of the area, you can see Arc Pass marked right at the bottom of the map.

We didn't hike up the steep walls North of the pass, we came up from the South via New Army Pass. This is a pleasant 2 or 3 day hike. The last day is very barren, so take plenty of water! If you go there, you can also take a side trip to Mt. Langley (14,042 ft) which, in our opinion, has a view even more spectacular than Mt. Whitney's.