The Toughest N Texas 50K, 20 Mile, 10 Mile, and 5 Mile trail races in Waco's Cameron Park are put on Houston running coach Tim Neckar. These races are small but friendly, but the course is tough! Waco's course is tougher than Cross Timbers, but not as tough as the Bandera Trail Races, to rank it among Texas ultras. The hills in Cameron Park keep coming, because the mountain bikers used every piece of vertical they could to make the trails interesting.