Timber Mesa is a good trail of moderate difficulty just a short drive from Lakeside Ranger Station. The 8.2-mile trail has just a few steep climbs. The natural surface of the trail is volcanic rock, which makes for interesting bike riding.
WARNING! Hiking and outdoor related sports can be dangerous. Be responsible and prepare for the trip. Study the area you are entering and plan accordingly. Dress for the current and unexpected weather changes. Take plenty of water. Never go alone. Make an itinerary with your plan(s), route(s), destination(s) and expected return time. Give your itinerary to trusted family and/or friends.