We initially named the 120x after the dirtiest, most technical, best kept secret in Austin: Thumper, the trail.

Charles Coker, the original owner Hammerhead Bikes, and Wes Hayslip, the former team leader for Hammerhead, designed and built this nasty little underground trail in the heart of a North Austin neighborhood. Picture limestone rocks and ledges, off-camber bench cut singletrack, babyhead rock gardens, and cedar roots littering the path at every turn. This trail is not for the inexperienced or faint of heart.

Austinbike.com describes it well: "Thumper got its name from the thumping that your heart will be doing after you are done. Up. Down. Repeat. A lot. This is a technical trail that was built by people who must like to inflict pain on others. While it is a relatively short trail, it is very difficult in many spots, similar to "rattlesnake" or "Ed's Bowl" on the greenbelt. Lots of switchbacks help riders ascend and descend through the trail. A favorite seems to be the steep switchback, sharp turn at the top, followed by a 12" ledge about 3 feet later. If this trail doesn't get your heart going, nothing will."