Hiked from Thomas Creek Trailhead. Out and back was about 15.5 miles and 4,300 ft. elevation gain. A very windy day, but a beautiful trail most of the way. Eventually cross country to get to the summit block and sign the register. No permits required, but a high clearance vehicles is needed to get all the way to the TH. Or you can park lower and hike a little further on the dirt road to the TH.