Hiked up to Mt. Lewis from Dawson Saddle since I was in the neighborhood. The use trail starts just west of the highway maintenance building behind the propane tank. Use trail is steep but easy to follow. No summit register. No clear cut high point either.
Pictures.
Trail head (left of tank)...
Great views of the South Fork of Big Rock Creek can be had from a rocky point a few hundred yards northwest of the summit area...
Looking across the canyon towards Islip Saddle...
Another victim on my 'Shameless Peak Bagger' list.