Two ups and two downs are all it takes to complete CM2. The first up is a moderately steep climb to the HQ (Khun Xang Kien Hmong Village). Then it's the first down; a descend on a wide dirt road to Huay Tung Tau Reservoir. This aid-station/check-point is also the half-way point of CM2. The rest is one more up to the HQ and one more down to the Finish. Competent road marathon runners may find that this is just the right kind of challenge!