Marshall Lake Fishing near Superior, Colorado

• Overview

  Marshall Lake lies in Boulder County, in Colorado. It sits in open valley. At about 220 acres, a day is enough to walk the shoreline properly. With 3.3 miles or so of shoreline, boat anglers cover ground the bank cannot. Size puts it in the front rank of our Boulder County list. You are 2.4 miles from Superior. Louisville lies 4.8 miles off, Boulder another 5.6 miles. A county line runs close by, so local bylaws can differ within a short drive.

• Where to Fish on Marshall Lake

  The records we hold are silent on depth, so plan to find it yourself. Standing timber shows when the level drops, and fish sit against it. Rip-rap along the wall holds fish that the open bank never does. Records held for Boulder County cover black-spotted cutthroat trout, brook trout, brown trout, bluegill and rainbow trout. Records at county level tell you what is around, not what is stocked here. Marshall Lake gives up its fish to patience rather than distance.

• Seasonal Patterns

  The warmest month averages 71°F, the coldest about 31°F. Whether it freezes depends on the year. In milder years the edges alone go, and the middle never sets. February into May fishes hardest as the water warms. Plan any trip to Marshall Lake around it. Water colour tells you more than the air temperature does.

• Tackle & Baits

  Whether the bank is open is not something our records settle. No made access is recorded, so a short walk in is the likely arrangement. Light line and small metal for the trout; a fly rod earns its place on calm evenings. Sort the permit out before you load the car. Close seasons apply to some species and not others. Should this one be busy, Cowdrey Reservoir Number 2 is 0.7 miles off. Treat Marshall Lake as unsettled until someone local tells you otherwise.