Union Reservoir is shaping up to be one of the top fishing destinations in Northern Colorado for 2026, and the early season outlook couldn’t be more exciting. In 2025, lower water levels kept the lake off many anglers’ radars until mid-June, which meant significantly reduced harvest pressure throughout the season. The result? Several strong year classes of walleye and wiper that got a free pass to grow, feed, and stack up. Heading into 2026, Union Reservoir is starting the year with healthy water levels — setting the stage for what could be one of the best early season bites we’ve seen in years. If you’ve been looking for a Northern Colorado lake to target eater-sized walleye this spring, Union should be at the top of your list.
Union Reservoir has long been one of the first lakes to turn on each spring along the Front Range, and 2026 should be no exception. Early season anglers can expect solid walleye action, some wipers mixed in, and even a few bonus trout to keep things interesting. Once water temperatures climb into the upper 50s — typically by late April — the wiper bite really kicks into gear, and the fishing stays strong through the Fourth of July. With reduced pressure from last year and a healthy forage base, expect fast action and quality fish. Don’t wait to book your guided fishing trip at Union Reservoir this spring — this is shaping up to be a season you won’t want to miss.