The blue trail bisects 150 feet from the parking lot: to the right, the rocky trail turns right and ascends to ridge line and turns left, reaching a rocky knob at 0.1 mile. This is the high point in the preserve. A yellow trail junction leaves to left, while blue trail descends to the remains of an old dam that powered a saw mill. It reaches Ayers Brook at 0.3 mile and turns right to follow the brook downstream. Next it crosses a wooden bridge over a tiny tributary and turns sharply left, ascending to cross the red trail, and then reaches the white trail at 0.6 mile. Blue blazes end here.
From parking lot, the trail continues downhill after bisecting on a wide woods road. Passes junction with the yellow trail at 0.1 mile, crosses a bridge over a stream at 0.2 mile, and reaches a junction with the yellow trail at 0.3 mile.