At the bottom of the steep section on the Yetman Trail
, the trail splits. Stay to the left. Shorty thereafter you'll come to another intersection. Head straight. The trail drops down to the wash. If you aren't watching, you can go down to the left and end up in the wash. It's rideable, but not as fun as the trail above.
Make sure to make the right up the hill before heading into the wash. The trail from here takes you to the pass. Once at the pass, continue straight and drop down. In the wash you'll see the trail go off to the right or straight. Either way, will get you to the same point, but the right is harder. The right takes you down and up some steep whoop-de-doos. At the end of them you'll get to an opening in the fence line. From here take a right. If you take the easier route down the wash it takes you down to a gate.
From there take a right up the access road to the opening in the fence. Continue on the access road and it will take you to the next gate. On the other side of the gate the singletrack continues to the left. The trail is more of what preceded it, rocky and heading up and down singletrack.
The Starr Pass Trail begins on the side of Lost Starr Place. If you are trying to find it, don't expect a sign. Just looks for singletrack on the west side of the road, near the famous 16th hole at Starr Pass. This is perhaps the most challenging way to access the Starr Pass Main Loop
and the Robles trails south of the Stone House Trail.
This access point is highly recommended for its technical climbing challenge with ~2-3 foot rock outcrop obstacles. If you are returning from Robles, use this trail and the rocky, doubletrack climb that branches off to the north before the descent towards the golf course to access the Rock Wren Trail
and the Genser Trailhead. There is a large parking lot at the Genser Trailhead with a kiosk and map, but there are no facilities.