The Derby Level 4 Open Championship at the 2021 Cactus Reining Classic was a three-way tie between Gunna Stop, Super Marioo and Americasnexttopgun. • Photo by Waltenberry. Reining Results RESULTS: 2021 Cactus Reining Classic Results from the 2021 Cactus Reining Classic, which was held March 17-21 at WestWorld of Scottsdale. READ MORE