Diamond Lake in Boulder County: How and When to Fish It

• Overview

  Diamond Lake belongs to Boulder County, Colorado. The land about it is mixed forest. The water measures roughly 17 acres, so nothing here is far from anything else. You are 7.7 miles from Nederland. Beyond it, Fraser at 9.4 miles and Coal Creek at 16 miles. A county line runs close by, so local bylaws can differ within a short drive.

• Where to Fish on Diamond Lake

  Open data we checked carries no depth for this water. Weed, then depth: that is the order to fish a water of this kind. A natural lake fishes on cover, and cover here means weed and timber. Across Boulder County, recorded fish include black-spotted cutthroat trout, brook trout, brown trout and bluegill. Take it as the county picture rather than a promise for this water. Diamond Lake repays a walk before the first cast.

• Seasonal Patterns

  Long-term averages put July at about 54°F and January near 20°F. Expect a real winter and a strong spring after it. The open season starts with the thaw, near enough mid May. The open-water window runs from around mid May to about mid November in an average year. Fish feed hardest at the start and the close of the open season. Plan around that when you fish Diamond Lake.

• Tackle & Baits

  The rules here are undocumented as far as public sources go. There is a campsite 160 yards from the water. Light line and small metal for the trout; a fly rod earns its place on calm evenings. Check whether a boat is allowed before you tow one. Close seasons apply to some species and not others. Should this one be busy, Upper Diamond Lake is 1.2 miles off. Confirm access to Diamond Lake locally before you travel.