Trabuco is a great trail, it has such natural flow, but if you need something a little more challenging there is always Yeager Mesa Trail. The trail that gets you to Yeager Mesa, Los Pinos trail is about 15ft. past the trabuco trail head on the right next to the Trabuco Trail head. Los Pinos trail will take you up to Los Pinos Peak which is above Trabuco trail. When you get to the top of Los Pinos Peak instead of continuing you make a right turn at fork onto a tight single track going through the bushes, this Unmarked trail is Bell Ridge Trail. This trail is steep and technical with a couple well worth Hike-A-Bikes. There is one steep Hike-A-Bike on Bell Ridge that brings you to the top of of a peak, there will be a trail on your right hand side, this is Yeager Mesa. You will then drop into Yeager Mesa, a very very steep and Technical trail, with great views. The trail takes you straight through one of the last pine forests of Orange county. You must be warned though, this trail is pretty gnar, it is comendable to make it to the bottom without falling. Luckily the ground is soft on this trail and there are plenty of ferns to pillow any falls. I would highly recommend riding this trail with some and not by yourself, only because it is a wilderness trail and it is one of the lighter ridden trails in the forest. if you were to get hurt it would be a while till some one found you. Also Yeager drops you out on West Horse Theif, then all you have to do is ride out the way you came and back down the fire road to your car. Have fun man! Its an awesome trail, its very unique, in my book its a must do!