The trail starts directly across Pacific Way (the entrance to Muir Beach) from the Pelican Inn. This fire road leads you to the Green Gulch Zen Center. Enter the gate and ride through the farms at the center. After a quarter mile, you'll take a right hand turn and exit the farm. There is a sign pointing towards Middle Green Gulch trail. Once you exit the farm through the gate, the Middle Green Gulch singletrack climb begins. After a tough series of 7 switchbacks, the trail opens up to a winding, scenic climb. One mile in, there is a very steep section about 100 yards long before the climb settles back to a more gentile grade.
At the top of the climb, if the weather is clear, you may be able to see the Golden Gate Bridge and downtown San Francisco through the hills. When you finish Middle Green Gulch, you can take a left on Coyote Ridge and climb the fire road for 0.5 miles to a peak with 360 degree views of the whole area. From there you can continue to Miwok trail and either descend into Tennessee Valley or return to Muir Beach via Diaz Ridge Trail
Other options include taking a right on Coyote Ridge when you finish Middle Green Gulch and descending back to Muir Beach on Coastal Fire Road
or following Coyote down to Tennessee Valley Beach.