Tumbleson Lake Fishing near Nederland, Colorado

• Overview

  Tumbleson Lake falls in Boulder County, part of Colorado. The country round it is farm and woodlot from end to end. The water measures roughly 11 acres, so nothing here is far from anything else. Nederland lies 9.9 miles from the water. Boulder is 13 miles away, with Lyons at 14 miles. It sits well inside the county, so one set of rules covers it.

• Where to Fish on Tumbleson Lake

  There is no recorded depth, so work from what you can see. Rip-rap along the wall holds fish that the open bank never does. Draw-down through summer strips the margins, so follow the water out. Reported across Boulder County: black-spotted cutthroat trout, brook trout, brown trout and bluegill. County records show the wider picture rather than this one place. On Tumbleson Lake the obvious spot is not always the productive one.

• Seasonal Patterns

  Climate records put July near 59°F and February near 25°F. The season stretches long at both ends here. Hard water here is never dependable, so check for yourself before stepping out. March through May is the strongest run, with October and November a second stretch. At Tumbleson Lake the season follows that pattern closely.

• Tackle & Baits

  There is no clear statement anywhere on who can fish it. Public data has parking about half a mile from the shore. For the trout, small spinners and a box of nymphs cover both approaches. Parking is often the real limit rather than the bank itself. Some water is controlled locally without a sign saying so. Failing this one, try Silver Spruce Reservoir Number 1, 0.9 miles away. What applies at Tumbleson Lake may have changed since it was mapped.