As indicated in the trailhead description, there may be a locked gate beyond the Portal campground, blocking vehicle access further up Lincoln Creek. It appears that the Forest Service keeps this road closed beyond the Portal CG up until 4th of July weekend, but it all depends on their assessment of road conditions. Therefore, as we said before, if you have a mountain bike(s), you could ride up this road for the 3.25 miles to where the climb for Petroleum Peak begins. This could save considerable time, especially on the return trip. The road, last time we were on it was in generally good condition and not too rugged. Drive, ride or walk this road to these coordinates, where an old jeep track heads off SW for Anderson Lake. N 39° 01' 51.35" W 106° 36' 54.99" Elev. 11,225