What You'll Find at Marys Lake

Marys Lake is a small, scenic reservoir nestled in the foothills west of Estes Park, roughly 8,000 feet in elevation. The lake holds rainbow trout and brook trout, making it a straightforward destination for anglers who want mountain water without the drive to high country. The shoreline is accessible in most places, and the setting — surrounded by ponderosa pine and Douglas fir — gives you the feel of backcountry fishing without requiring a backcountry trek.

The lake is roughly 50 acres and relatively shallow, which means the water warms faster than deeper alpine lakes and the trout bite can be consistent through the season. Marys Lake is not a trophy fishery — most fish run 8 to 12 inches — but it is reliable for catching numbers of trout if you fish the right times and methods.

Key Takeaways

  • Marys Lake holds rainbow and brook trout in the 8- to 12-inch range, with the best fishing from May through October.
  • The lake sits on private property with a day-use fee; you must enter through the resort area and pay at the gate.
  • Shoreline access is good around most of the lake, and both spin gear and fly rods work well depending on the season and time of day.
  • Early morning and evening produce the most consistent bites, especially during summer when midday water temperatures slow the bite.
  • A Colorado fishing license is required; check current regulations for any special restrictions on Marys Lake before you go.

Access and Day-Use Requirements

Marys Lake is located on private property managed by the Marys Lake Resort. To fish, you must enter through the resort and pay a day-use fee at the gate. The fee structure varies by season; call ahead to confirm the current rate and whether the lake is open on the day you plan to visit. The resort office can also tell you about parking, restroom availability, and any temporary closures.

The lake is roughly 8 miles west of Estes Park on Colorado State Highway 7. From downtown Estes Park, take Highway 7 toward Allenspark and watch for the Marys Lake Resort sign on your left. The drive takes about 15 minutes from the town center. Parking is available near the gate, and from there the shoreline is a short walk.

Seasons and Water Conditions

Marys Lake is fishable from late spring through fall, with May through October offering the most reliable conditions. The lake can remain partially iced over into April, and by November water temperatures drop sharply and fish become less active. Summer is the most popular season, but also the most crowded; if you prefer fewer anglers, fish in May, June, or September.

Water levels fluctuate depending on irrigation demand and snowmelt. The lake is typically fullest in early summer and can drop noticeably by late August. Lower water concentrates fish in deeper areas, which can actually improve your chances if you know where to look. Check with the resort about current conditions before you go, especially in late summer.

What Gear and Methods Work Best

Both spin fishing and fly fishing produce at Marys Lake. Spin anglers do well with small spoons (1/8 to 1/4 ounce), spinners, and inline spinners in silver or gold. Cast from the shoreline and retrieve steadily; the trout here are not particularly selective and will chase moving lures. Worms and small minnows under a bobber also work, especially early in the season when water is cold.

Fly anglers should bring small nymphs (size 14 to 18), especially midges and mayfly nymphs. Dry flies work during evening rises, particularly in June and July. A 5- or 6-weight rod is plenty for the fish here. Because the lake is shallow and relatively clear, fish early and late in the day when light is low; midday sun makes trout spooky and less willing to feed.

Best Times to Fish

Early morning — from first light until about 9 a.m. — is consistently the most productive time at Marys Lake. Fish are actively feeding after the night, and the low angle of the sun keeps them from seeing your shadow or your line. Evening, from about 6 p.m. until dark, is the second-best window. During summer, the hour or two after sunset can be excellent as water temperatures cool.

Midday fishing (10 a.m. to 5 p.m.) is possible but slower, especially in July and August when the sun is high and water warms. If you must fish midday, focus on the deeper parts of the lake or shaded areas near the shoreline. Overcast days improve midday fishing because cloud cover keeps water temperatures lower and makes trout less light-sensitive.

Regulations and Licensing

A valid Colorado fishing license is required. You can purchase a one-day license, a five-day license, or an annual license through Colorado Parks and Wildlife (CPW). Licenses are sold online at the CPW website, at sporting goods stores in Estes Park, and sometimes at the resort gate itself, though calling ahead to confirm availability is wise.

Marys Lake may have special regulations separate from statewide rules — for example, different bag limits, size restrictions, or seasonal closures. Before you fish, check the current Colorado Parks and Wildlife fishing regulations for Larimer County or call the Estes Park ranger district. The resort staff can also tell you what the current rules are for the lake.

What to Bring and Expect

Bring sun protection: sunscreen, a hat, and polarized sunglasses. The elevation and reflective water intensify UV exposure. Bring plenty of water to drink, especially in summer. The shoreline offers some shade from trees, but much of it is open, so plan accordingly. A small cooler with ice will keep any fish you catch fresh if you plan to eat them.

The resort has restroom facilities, and the grounds are well-maintained. Bring your own snacks and lunch; there are no food vendors at the lake itself. If you plan to wade, bring wading boots or old sneakers — the bottom is muddy in places. The lake is not deep enough to require a boat, and boats are not typically allowed anyway, so shore fishing is your only option.

Frequently Asked Questions

Can I fish Marys Lake without a Colorado license?

No. A valid Colorado fishing license is required for anyone 16 and older. You can purchase a one-day license if you do not want an annual license. Children under 16 may fish without a license if they are supervised by a licensed adult.

What is the day-use fee and how do I pay it?

The fee is charged at the gate when you enter the resort property. The amount varies by season; call the Marys Lake Resort ahead of time to confirm the current rate and payment methods. Some visitors pay cash, while others use card payment — confirm what the resort accepts before you arrive.

Can I keep fish I catch at Marys Lake?

Yes, if you follow Colorado Parks and Wildlife regulations for Larimer County. Bag limits and size restrictions may apply. Check the current regulations before you fish, or ask the resort staff what the rules are. If you keep fish, bring a cooler with ice to keep them fresh.

Is Marys Lake good for beginners?

Yes. The fish are not large or particularly difficult to catch, and the shoreline access is easy. Spin fishing with simple gear works well, and you do not need advanced technique to catch trout here. It is a good place to learn if you are new to fishing.

What should I do if the lake is closed when I arrive?

Call the Marys Lake Resort ahead of time to confirm the lake is open on your planned visit date. If you arrive and find it closed, nearby alternatives include Lily Lake (also near Estes Park) and various sections of the Big Thompson River, though those may have different access requirements and regulations.