Longmont-to-Boulder (LOBO) Regional Trail
The Longmont-to-Boulder (LOBO) Regional Trail passes just northwest of Gunbarrel Green, at Lookout Road (see map). There’s a detailed brochure (PDF), including a larger map, on the Boulder County web site.
Tom Watson Park
Tom Watson Park is located on 63rd Street, just across Lookout Road from Gunbarrel Green. Amenities include: Playground, Picnic shelters, Ball fields, Basketball, Tennis courts, Volleyball, and Restrooms.