3 Apr 2016 Hikes 3-5 miles, contra costa county, east bay, moderate Briones Regional Park Park Access Rd., Lafayette, CA 94549 4.5 miles // < 2 hours // mostly exposed You can go all the way to Berkeley to extend your hike. Share with: Lovely wildflowers. Two beautiful labs as hike mates. Everything's gorgeous and green after winter's rain. The ranch. Some steep inclines. Gorgeous shaded path. We went all the way up. Lafayette reservoir. You could hike all the way to Berkeley.