What Lon Hagler Reservoir offers

Lon Hagler Reservoir is a 160-acre impoundment in northeastern Colorado, about 40 miles northeast of Denver near the town of Fort Morgan. The lake holds both walleye and northern pike, with occasional largemouth bass, making it a destination for anglers who want variety without a long drive from the Front Range. The water is relatively shallow and productive, which keeps fish active and accessible to both boat and shore anglers.

The reservoir sits on the South Platte River system and fills seasonally depending on irrigation demand and snowmelt. Water levels can fluctuate significantly from spring through fall, which affects where fish hold and how accessible certain areas become. Summer is the most reliable season for fishing, though spring and fall can produce good results if you time the water conditions right.

Key Takeaways

  • Lon Hagler holds walleye and northern pike as primary species, with largemouth bass present but less abundant than at other Colorado reservoirs.
  • The lake is shallow and productive, making it suitable for both experienced anglers and those new to reservoir fishing.
  • Water levels drop significantly during irrigation season, so confirm current conditions before planning a trip.
  • A Colorado Parks and Wildlife fishing license is required, and the lake has specific regulations for pike and walleye that change annually.

Species and seasonal patterns

Walleye are the primary draw at Lon Hagler. They respond well to live bait presentations — shiners and crawfish work consistently — and to jigs tipped with minnows. Early morning and evening are peak times, though walleye at this reservoir will bite throughout the day if you fish deeper structure. Spring and fall tend to produce the largest fish, while summer fishing is steadier but with smaller average size.

Northern pike are present and growing in population. Pike fishing peaks in spring when fish move shallow to spawn, and again in fall as water cools. Larger pike (18 inches and up) are caught regularly, and the lake's shallow structure means you can sight-fish pike in clear water during calm mornings. Pike will take large shiners, swimbaits, and topwater lures, especially around weed beds and structure.

Largemouth bass exist in the reservoir but are not the focus of most anglers here. They are more abundant in the shallower bays and around vegetation, and respond to standard bass tactics — soft plastics, crankbaits, and topwater — but the population does not compare to dedicated bass lakes in Colorado.

Access, facilities, and boat requirements

Lon Hagler has one primary public access point on the north shore, managed by Colorado Parks and Wildlife. The access area includes a boat ramp, parking for vehicles with trailers, and a small day-use area. There is no camping at the reservoir itself, though Fort Morgan and surrounding areas have private campgrounds and motels within 15 to 20 minutes of the lake.

A motorized boat is helpful but not required. Shore fishing is productive, especially along the north and east banks where structure and depth are more accessible. If you bring a boat, note that the ramp can be difficult to use when water levels are low — check current conditions with Colorado Parks and Wildlife before launching. Kayaks and canoes work well for reaching deeper water and exploring the lake's structure.

The lake has no on-site services — no bait shop, no fuel dock, no food. Bring everything you need, including water and snacks. The nearest services are in Fort Morgan, about 10 miles away.

Regulations and licensing

A valid Colorado Parks and Wildlife fishing license is required for anyone 16 and older. Licenses are sold online at cpw.state.co.us, at sporting goods stores, and at many convenience stores throughout the state. A one-day license costs less than a full-year license if you fish only occasionally.

Walleye and pike have specific regulations that change each year. As of recent seasons, walleye have a daily limit of 6 fish with a 15-inch minimum size, and pike have a daily limit of 5 fish with a 24-inch minimum size. Regulations can shift, so check the current Colorado Parks and Wildlife fishing guide before you fish. Largemouth bass follow statewide regulations, typically 5 fish per day with a 12-inch minimum.

The reservoir is open year-round, though winter fishing is less common due to ice and cold. Some years the lake freezes solid enough for ice fishing, but conditions vary. Contact Colorado Parks and Wildlife or the Fort Morgan area office to confirm winter access before planning a winter trip.

When to fish and what to expect

Spring (April through May) brings rising water levels and active fish as they move shallow to feed and spawn. Walleye fishing is excellent, pike are aggressive, and the weather is unpredictable — bring layers and be prepared for wind. Water temperatures climb from the 40s to the 60s, triggering feeding activity across all species.

Summer (June through August) is the most crowded season and offers the most stable conditions. Water levels begin to drop as irrigation demand increases, concentrating fish in deeper holes and channels. Early morning and evening remain the most productive times, but daytime fishing is possible if you target deeper water and structure. Afternoon thunderstorms are common and can arrive quickly.

Fall (September through October) brings cooling water and renewed activity. Walleye and pike feed heavily in preparation for winter, and the lake is less crowded than summer. Water levels continue to drop, so some shallow areas become inaccessible. This is often the best season for large pike and walleye.

Winter (November through March) is quiet and cold. The lake may freeze, limiting access. Some years ice fishing is possible, but conditions are unpredictable. Most anglers avoid this season unless they specifically target winter walleye through the ice.

Gear and tactics for Lon Hagler

For walleye, a medium-action spinning rod with 6- to 8-pound monofilament or braided line works well. Jigs in the 1/8- to 3/8-ounce range, tipped with live minnows or crawfish, are the standard approach. Crankbaits that reach 8 to 12 feet are effective in summer when fish move deeper. Fish slowly and deliberately — walleye are not aggressive chasers at this reservoir.

Pike fishing calls for heavier gear: a medium-heavy spinning rod or baitcasting setup with 10- to 15-pound line. Large shiners (6 to 8 inches) on simple live-bait rigs work consistently. For lures, swimbaits, large crankbaits, and topwater plugs are effective, especially in spring and fall. Pike will hit hard and run, so be ready for a fight.

Shore anglers should focus on structure — points, drop-offs, and weed beds — and fish early and late in the day. A good pair of polarized sunglasses helps you spot fish in the shallow water. Bring a headlamp if you plan to fish at dawn or dusk.

Getting there and planning your trip

Lon Hagler Reservoir is located near Fort Morgan, Colorado, approximately 40 miles northeast of Denver. From Denver, take Interstate 76 north toward Fort Morgan, then follow local roads to the reservoir. The drive takes about one hour from central Denver. GPS coordinates for the north access area are approximately 40.35°N, 103.75°W.

Plan to spend a full day at the lake. Bring sunscreen, water, snacks, and a first-aid kit. Weather can change quickly in northeastern Colorado, so pack a rain jacket and extra layers even in summer. If you are launching a boat, arrive early to secure a parking spot and avoid the ramp during peak hours.

Contact the Colorado Parks and Wildlife Northeast Region office in Fort Morgan for current conditions, water levels, and any temporary closures. They can also provide information about recent fish catches and which techniques are working best.

Frequently Asked Questions

Can I fish Lon Hagler without a boat?

Yes. Shore fishing is productive, especially along the north and east banks. You will have the best success fishing early morning or evening, and targeting structure like points and drop-offs. A kayak or canoe is a good middle ground if you want to reach deeper water without a motorized boat.

What is the best time of year to catch large walleye?

Spring (April–May) and fall (September–October) produce the largest walleye. Summer fishing is more consistent but with smaller average size. Water temperature and feeding patterns drive this — walleye are most aggressive when water is cool and they are preparing for seasonal changes.

Are there facilities at the reservoir?

The north access area has a boat ramp and parking, but no bait shop, fuel, food, or camping. Fort Morgan, about 10 miles away, has restaurants, gas stations, and lodging. Bring all supplies you need for the day.

What happens to water levels during summer?

Water levels drop significantly as irrigation demand increases. This concentrates fish in deeper areas and can make the boat ramp difficult to use. Check current conditions with Colorado Parks and Wildlife before launching, especially in late summer.

Do I need a special permit to fish pike at Lon Hagler?

No. A standard Colorado Parks and Wildlife fishing license covers pike fishing. Pike are subject to the daily limit and size regulations listed in the current fishing guide, which you should review before fishing.