Trail-blazers

Winterize your lungs and set those endorphins loose on Sunday, Nov. 19, at the fifth annual Presidio Trails 5K or 10K Run in San Francisco. It’s a chance to take in the pine-scented gorgeous greenery through the park’s winding trails. The ocean views are spectacular—and the run will get your muscles tuned for carving those freshies. More information.

BONUS: If you’re ready to run this weekend, make like Dean Karnazes and sprint to Redwood Trails’ Pt. Reyes Beach and Trail Run on Saturday. This one’s completely on the beach: even shoes are optional. (Just imagine you’re gliding through powder.) Register online before the 200 slots sell out: $24.95 for the 5K, $34.95 for the 10K or half-marathon.