Golden Gate Canyon State Park, State park in Gilpin and Jefferson counties, Colorado, United States

Golden Gate Canyon State Park is a 12,119-acre Colorado state park in Gilpin and Jefferson counties northwest of Golden. It holds 42 miles of hiking trails, with horse and bicycle travel allowed on 27 miles. Forested slopes of ponderosa pine, Rocky Mountain juniper, Douglas fir and aspen rise to grey rocky summits, and wetlands line Ralston, Nott and Deer creeks.

Golden Gate Canyon State Park was established in 1960 as a Colorado state park on 12,119 acres in Gilpin and Jefferson counties northwest of Golden. The park lies on mountainous terrain reaching 2,878 metres, with Tremont Mountain rising to 3,163 metres about 2 km away. It recorded 1,045,131 visits in 2019, a 20.6% increase over 2018.

The park's name comes from a rock formation at the canyon mouth that early travelers called the Golden Gate. Visitors today see mule deer, elk, black bear, mountain lion, Abert's squirrel and pine squirrel, and moose are increasingly spotted. Birds include the turkey vulture, Steller's jay, Clark's nutcracker, mountain bluebird and mountain chickadee.

The park lies in Gilpin and Jefferson counties northwest of Golden, with a visitor center, over 100 campsites and 125 picnic sites. Hiking trails total 42 miles (68 km), and horses and bicycles are allowed on 27 miles (43 km) of them. Trails cross different elevations, so bring layered clothing and water.

From Panorama Point lookout the view extends more than 100 miles (160 kilometers) to the Continental Divide of the Rocky Mountains. On clear days you can see peaks and valleys stretching to the horizon.