If Sheep mountain isn't enough for you, then continue straight at the east fork turnoff and you'll eventually hit a road. Climb this road (which gets tough) and you'll see some singletrack snaking down near the top. Take this and you'll be rewarded with the steepest, most gnarly descent in the Rattlesnake area. A few fast sections are broken up with super steep, fall line rock gardens. If you're on a hardtail, you'll be wishing for more travel.