"This loop, combining the Bear Creek and Oursan trails, is one of the longest in this book, taking you completely around Briones Reservoir. The route passes through a variety of terrain, from dense oak and bay forest near the reservoir’s shore to open grassland high atop Sobrante Ridge. Along the way you will encounter grand vistas, an assortment of trees and shrubs, spring wildflowers, and birds by the dozen. Except for about 3 miles of the Bear Creek Trail, the entire trip is on well-graded dirt roads. (Be alert for vehicles, which use the roads.) Just beyond the gate at the trailhead are an EBMUD register and a sign for the Bear Creek Trail. After signing the register, turn left, and descend the Bear Creek Trail, here a gravel path, to a clearing where Bear Creek flows in from the left. After crossing the creek—this may be tricky during periods of high water—climb steeply on an eroded dirt path and, in about 200 feet, reach a trail post indicating the Bear Creek Trail and the Overlook staging area, 4 miles distant."