Start with a downhill! Finish with a long climb.
This is one fun ride. You start with blazing fast downhill singletrack and finish with a long climb back out to your car. To start, take the Whittmore Gulch Trail down to Higgins Purisima Rd. and ride back up. If this doesn't do it for you, there's plenty more here to explore. Lots of great trails to explore.
How to get there:
From San Francisco take 28 South to HWY 92. Take HWY 92 West towards Half Moon Bay and then turn left onto HWY 35/Skyline Blvd. Stay on Skyline for about 2.5 miles and park in the lot on the right.