Day 1 (Del Valle to Rose Peak) - Part 1
Del Valle's Lichen Bark picnic area has a sign marking the eastern terminus of the Ohlone Trail. The first mile is a gentle up-and-down to a sign-in board. Be sure to enter your trip on the board so rangers will know you're out there in case of fire or other emergency.
From the sign-board it's a grueling climb up an old ranch road. After about two-thirds of a mile (it'll seem much longer), you'll hit a T where you've got two choices: another very steep half-mile to the left or a gentler but longer route to the right along the Rocky Ridge section of the trail. This stretch is a bit more scenic and worth a try if you're feeling energetic.
Both trails converge again atop a high ridge overlooking the Diablo Range -- one of many stunning vistas to come.
Next comes a plunge down to Williams Gulch (crossing the stream can be tricky after heavy rains) and another wicked push up the infamous Big Burn: 1,400 feet of climb in a mile and a half.