Recreation » Outdoors
American Volkssport Association - http://www.ava.org/
Your guide to more than 1850 self-guided walking and biking trails throughout the USA.
Central Texas Trail Tamers - http://www.trailtamers.org/
A group of ready volunteers from the general public throughout Texas and beyond who donate our time and effort to build and repair natural surface trails, including those that are ADA accessible.