Op Schnabel Park features 20 miles of hiking trails near San Antonio, TX.
In San Antonio, take IH 410 to HWY. 16 (Bandera Rd.) and go north 4.5 miles. The park entrance is on the right (there is a sign that reads, OP Schnabel Park." Once you enter the park you can either take a left into the first parking lot (the trail begins on the right side of the lot) or take a left at the first STOP sign. The parking lot is on the right (up from the pavilion). The trail head is on the right side of the parking lot (as you enter the lot).
http://www.tripleblaze.com/trail.php?c=3&i=79