We made it to the top of Mt Catherine in 45 minutes from the new? trailhead. From exit 54, just under 3 miles down road 9070, the trail is on the right side. There is no mention of Mt Catherine, just a sign marked 1348. This is a very mellow trail with only a few hundred feet of light scrambling near the top, and the only sketchy section is endowed with a cable. Thick clouds with scattered snow and rain meant no view today.
After a quick trip up Mt Catherine, Maverick and I headed down the PCT towards Silver Peak. About 2 miles from road 9070 just after passing through a talus field and then losing some elevation with a few switchbacks, a cairn marks the Tinkham Peak/Silver Peak trail. Less than a mile down the trail splits to the North and South, and the one to Tinkham summit gets real steep, real quick. I will never again hike in possible snow without traction devices.