Home › Venues › Douglas County Fairgrounds Douglas County Fairgrounds Tickets Buy tickets for concerts at Douglas County Fairgrounds in Castle Rock, CO. No Upcoming Events No upcoming events scheduled at Douglas County Fairgrounds. Please contact us with any corrections. Hotels & Lodging Near Douglas County Fairgrounds About the Venue Douglas County Fairgrounds At-a-Glance Address500 Fairgrounds DrCastle Rock, CO 80104United States Map & Directions Advertisement