Started at the Little Sacramento Th and ascended Gemini's huge, broad, grassy east ridge to the summit of Gemini. Descended and hiked .7 miles over Sherman's huge grassy north ridge to the summit. Descended and hiked .5 mile on talus to Mt. Sheridan. On the way back skirted Gemini's summit to the west and hiked Dyer Peak(another centennial 13er). Watch out for the power lines! Descended straight down into Sacramento Creek Drainage and back to the car. A long day. Only people I saw were hiking Sherman, otherwise I think I went 9 hours with meeting another soal. Those grassy broad ridges are really cool places to visit.