Quick Info
Species: Rainbow, brown, brook, and cutthroat trout. Best spots: Big Thompson River, Fall River, Lake Estes, backcountry lakes. License: Required—Colorado fishing license available at local shops or online. Season: Year-round, with peak action June-September.
The crystal-clear streams and alpine lakes around Estes Park provide excellent trout fishing in stunning mountain settings. Whether you prefer casting dry flies on a freestone stream or relaxing with a bobber on a stocked lake, the area delivers. The fishing isn't always easy—these are wild trout in clear water, often wary from fishing pressure—but the scenery makes every outing worthwhile.
Rocky Mountain National Park adds a unique dimension to local fishing. The park's waters are managed for native greenback cutthroat trout restoration, with catch-and-release requirements on many waters. Outside the park, the Big Thompson River and Lake Estes offer more accessible fishing with different regulations.
River Fishing
Big Thompson River flows through the canyon between Estes Park and Loveland, providing the area's most accessible stream fishing. Brown and rainbow trout inhabit the river, with fish averaging 8-12 inches and occasional larger browns. The canyon section requires careful footing on boulder-strewn banks, but pocket water and pools hold willing trout. Lower sections near town see more pressure.
Fall River runs through Estes Park and into Rocky Mountain National Park. It's smaller than the Big Thompson but holds brook and brown trout in its meadow sections. Within the park, special regulations may apply—check current park fishing regulations before wetting a line.
Colorado River headwaters on the park's west side offer a different experience. The upper river holds brook trout and greenback cutthroat. Access requires driving over Trail Ridge Road or entering from Grand Lake. Fewer anglers fish this side of the park.
Lake Fishing
Lake Estes sits right in town, stocked regularly with rainbow trout. It's the most accessible lake fishing, with shoreline access and boat rentals available. Not wilderness fishing, but a good option for families and casual anglers. Early morning and evening are most productive.
Sprague Lake in the national park is wheelchair-accessible and stocked with greenback cutthroat. Catch-and-release only. The lake is beautiful and the fishing is straightforward—a good choice for introducing kids to mountain fishing.
Backcountry lakes in Rocky Mountain National Park require hiking but offer solitude and wild trout. Fern Lake, Odessa Lake, and the Loch are accessible on day hikes and hold brook and cutthroat trout. These are small fish in pristine settings—the experience matters more than the size.
Mary's Lake and Lily Lake near Estes Park offer additional stillwater options with easier access than backcountry waters. Both hold trout and provide pleasant fishing in scenic surroundings.
What Works
Fly fishing is the most popular approach on streams, with small dry flies (sizes 16-20) effective when fish are rising. Elk hair caddis, parachute Adams, and stimulators cover most situations. Nymphing with bead-head patterns produces when surface action is slow.
Spin fishing works well on lakes and larger pools. Small spinners (Rooster Tails, Panther Martins) in sizes 1/16 to 1/8 oz produce strikes. PowerBait and nightcrawlers are effective on stocked lakes like Lake Estes.
Light tackle is essential on clear mountain water. 4-6 weight fly rods for streams, ultralight spinning gear with 4-6 lb test line. Heavy tackle spooks fish and doesn't improve landing rates on these modest-sized trout.
Licenses & Regulations
Colorado fishing license is required for anyone 16 or older. Purchase online through Colorado Parks & Wildlife or at local sporting goods stores like Estes Angler and Kirk's Fly Shop. One-day, five-day, and annual options are available.
Rocky Mountain National Park requires a valid Colorado fishing license plus awareness of park-specific regulations. Many park waters are catch-and-release only, and some are closed to protect native fish restoration. Pick up a current park fishing brochure at any entrance station or visitor center.
Artificial flies and lures only is the rule on many park waters. Check specific regulations for the water you plan to fish—they can vary by stream and lake.
Frequently Asked Questions
Do I need a guide?
Not required, but helpful for first-time visitors. Local guides know current conditions, access points, and techniques that produce. Kirk's Fly Shop and Estes Angler both offer guide services.
Where can I buy fishing gear?
Kirk's Fly Shop and Estes Angler in downtown Estes Park carry flies, tackle, and can provide advice on current conditions. Both offer rod and wader rentals.
Is the fishing any good in winter?
Yes, but challenging. Ice fishing is possible on Lake Estes and some park lakes. Open water fishing continues on rivers, with midday the most productive time. Layer up and expect slower action.
Can kids fish in the national park?
Yes. Children under 16 don't need a fishing license in Colorado. Sprague Lake is ideal for kids—accessible, stocked, and beautiful. Bring patience and snacks.