Barr Lake State Park has it all. Biking, hiking, horseback riding, fishing, boating, bird watching and nature viewing. In the winter you’ll find the eagle nesting and in the summer you’ll find over 300 species of birds. I have been going at least once a season, if not more. It’s easy to get to in Brighton, Colorado. It’s a state park so it is pay to enter. Get your yearly state park pass here.
When I go I park in two different areas. At the visitor center to walk the south east of the lake and then over to the doc’s for the north east side. I follow the trail around the lake for about 1.5 miles each location if I have only a couple hours. The whole path around the lake is 8.8 miles. When you travel the entire lake you’ll experience much more wildlife, you’ll see cormorant island, the eagles nests, plenty of owl nests, plus all kinds of raptors and other creatures along the way. Be sure to bring your binoculars and your zoom lenses!