With the outdoors wrapped up and the 2018 season now a stat of the past, the 2019 Monster Energy Supercross championship is now the focus of the sport. Though the factory teams have their own test tracks in the hills of Corona, CA, some public tracks, such as Milestone MX Park, shape a new SX track for riders to test and practice on. Recently, the crew at Milestone finished up their SX track, and we were on-hand to film Ryan Surratt and Martin Castelo break it in.