L.B. Houston Nature Area packs more than 10 miles of marked mountain-bike trail into Northwest Dallas beside the Elm Fork of the Trinity River. Riders can link wooded loops, small dips, technical choices, river views, and calmer stretches into either an endurance-focused outing or a relaxed ride. The trail is designed for beginner and intermediate riders, but its variety keeps regulars engaged. Check conditions before heading out, especially after rain.