Grizzly Flat Trail is a hiking, biking, and horse trail in Palo Alto, California. It is within Upper Stevens Creek County Park and Long Ridge Open Space Preserve. It is 1.4 miles long and begins at 2,319 feet altitude. Traveling the entire trail is 0.7 miles with a total elevation gain of 161 feet. Grizzly Flat Trail Parking Area and another parking are near the trailhead.