Registration opens in March for Girls Middle School and High School Flag Football in Douglas County, serving Castle Rock, Castle Pines, and Highlands Ranch. This girls flag football league offers skill development, competitive play, and quality coaching for athletes of all experience levels in a positive and empowering environment. Convenient locations across Castle Rock, Castle Pines, and Highlands Ranch make it easy for families to participate. If you’re looking for girls flag football in Douglas County or middle and high school girls flag football near Castle Rock, Castle Pines, or Highlands Ranch, registration opens in March and spots will be limited.