Colorado lakes you can swim in are designated park beaches — Cherry Creek, Chatfield, Boulder Reservoir, Horsetooth, Bear Creek / Big Soda Lake — not Dillon Reservoir, where Denver Water bans swimming. Confirm 2026 hours and whether buoys are even in.
- In-metro beaches
- Cherry Creek · Chatfield · Boulder Reservoir
- Northern Front Range
- Horsetooth · Boyd Lake (2026 caveats)
- No-swim
- Dillon, Antero, Williams Fork, Cheesman
Most “lakes near me” results in Colorado mix fishing water, drinking-water reservoirs, and actual swim beaches. This guide is the swim-legal layer for 2026: designated beaches with official park links. We do not invent Horsetooth or Cherry Creek as Secret Swimming Holes listings — those parks already publish hours, fees, and closures. Mapped wild holes (gorges, punchbowls) live on swimming holes near Denver and the Colorado swimming holes guide.
Nationwide lake workflow: lakes to swim in near you, closest lake to swim in, and the lake type hub. Front Range city lists: Denver, Boulder, Fort Collins.
How to read this page
| Category | What it is | What we do |
|---|---|---|
| Designated swim beach | Buoys, sand or pea gravel, park pass, posted season | Link the official park page |
| Swimming allowed, no beach this year | Water is legal; buoys/testing may be off | Say so (Boyd Lake 2026) |
| No-swim reservoir | Drinking water, cold, rescue risk, or both | Name it so you do not drive I-70 for a dip |
| Swimming hole | Canyon / river pool in our directory | Link our listing, not a fake lake page |
Front Range beaches you can actually swim (official)
Cherry Creek State Park — The closest full swim-beach day to central Denver. Sandy beach and roped swim area; bathhouse. CPW lists the swim beach Memorial Day through Labor Day. Colorado State Parks vehicle pass required. After Labor Day, do not assume the beach is still in.
Chatfield State Park — South-metro reservoir beach and swim area; same CPW pass family as Cherry Creek. Confirm the current swim-beach status on the Chatfield park site before you go — water levels and seasonal operations change.
Boulder Reservoir (City of Boulder) — Swimming is only legal in the designated lifeguarded area (and permitted open-water programs). Typical hours in season ~10 a.m.–6 p.m.; Memorial Day weekend through Labor Day. City code does not let you hop in from a random cove.
Horsetooth Reservoir (Larimer County) — The Fort Collins “lake near me” answer. Swim at designated beaches, not the dam or random shoreline. County fees and boat inspections apply. This is a park beach, not a secret swimming hole.
Bear Creek Lake Park / Big Soda Lake (City of Lakewood) — Swim beach on Big Soda Lake, Memorial Day–Labor Day, roughly 8 a.m.–8 p.m. No lifeguards. Dogs on leash, not on the sand. Lap lane has closed when water is low — check the city activities page.
Grand Lake (the town lake west of Rocky Mountain National Park, not a Denver Water reservoir) — Town / local swim access is the usual high-country beach people mean. It is a long drive from Denver; treat it as an overnight, and confirm current town rules. Alpine water stays cold.
2026 caveats the old listicles skip
Boyd Lake State Park (Loveland) — Still on every 2021 “8 swimming lakes” roundup as a groomed beach. In 2026, low water meant CPW did not install swim-beach buoys, did not run the usual E. coli testing, warned that swimming was at your own risk, and closed boat ramps for the season. Hand-launch paddle craft and swimming were still allowed. Muddy, long walk to water. Recheck CPW the week you go.
Union Reservoir (Longmont area) — Local reports in 2026 pointed to a closed swim beach for the season because of low water. Do not assume last year’s beach is in; use the city’s park page.
Season timing: Cherry Creek and Boulder Reservoir beaches are built around Memorial Day–Labor Day. This guide is dated September 7, 2026 — if you are reading after Labor Day, many Front Range swim beaches are already closed even when the lake still has water.
Do not swim: Dillon and other Denver Water reservoirs
Dillon Reservoir (Frisco / Dillon / Breckenridge) — Swimming, scuba, and water-skiing are prohibited. Summit County / Denver Water rules allow wading with feet on the bottom; propelling your body through the water (including treading water) is still swimming. The water is a drinking-water supply, very cold even in August (~40s–low 60s°F), and rescue on a lake this size at 9,017 feet is hard. Boating and paddling are the recreation here — not a swim.
Same no-swim pattern on other Denver Water mountain reservoirs, including Antero, Williams Fork, and Cheesman. Denver Water’s safety notes are explicit: reservoirs are closed to swimming because of cold water.
Hanging Lake (Glenwood Canyon) — water contact is not the activity; the site is a heavily managed hike with its own permit system. Not a swim beach.
Mapped swimming holes (different sport)
If you wanted a canyon pool, not a buoyed beach:
- Guffey Gorge and Queens Canyon punchbowls — Front Range wild holes
- Curecanti NRA swimming spots — managed Western Slope reservoirs (Blue Mesa country), not Cherry Creek
- Island Acres — official swim area east of Grand Junction on I-70
Those pages are in our directory with coordinates. Horsetooth is not, on purpose.
Fees, dogs, and GPS
State park beaches need a Colorado State Parks vehicle pass. City and county parks (Boulder Reservoir, Horsetooth, Bear Creek) have their own day fees. “Free lake swim” in Colorado usually still means a parking fee.
Dogs: many designated swim beaches ban pets on the sand even when the park is otherwise dog-friendly (Bear Creek’s sand rule is explicit). Use dog-friendly swimming near me only for directory listings that mention dogs — it will not magically make Cherry Creek a dog beach.
Live sort from your phone: lakes near me. Full lake catalog: /types/lake/.
Weekend flow
- Decide beach vs canyon hole before you start the car.
- Open the official park URL the morning you go — 2026 proved beaches can vanish when water drops.
- If the pin is Dillon, go paddle or pick Cherry Creek / Horsetooth instead.
- After Labor Day, assume Front Range swim beaches are done unless the park says otherwise.
Colorado lake swimming is permission-first: a beautiful alpine shoreline is not a swim invitation.
Spots from our directory
Island Acres
Situated east of Grand Junction along the I-70 corridor, this officially recognized swimming area. Whether you're a family road-tripping through the Rockies or an adventurer chasing the next great .
View detailsCurecanti National Recreation Area Swimming Spots
Here, where the Gunnison River was once dammed to create this vast blue expanse, swimmers and wanderers arrive along Route 50 to find something unexpected: a landscape that feels simultaneously ancient and alive, where red-rock mesas drop toward turquoise water and bald eagles circle overhead.
View details
Guffey Gorge
Carved by Fourmile Creek over millennia, this dramatic natural amphitheater rewards the adventurous with emerald-hued water, soaring cliff walls, and an atmosphere that feels genuinely removed from the ordinary world.
View detailsQueens Canyon Punchbowls
Queens Canyon Punchbowls near Colorado Springs, Colorado are free cascading granite pools used for swimming. Informal foothills access — check depth; flash floods possible after storms.
View details
Devils Punchbowl
Devil’s Punchbowl on the Roaring Fork River near Aspen / Glenwood Springs, Colorado is a free waterfall plunge-pool swim. Powerful current and cold water — expert caution only; many years see injuries.
View detailsDominguez Canyon
Dominguez Canyon near Grand Junction, Colorado is a river swimming spot on Gunnison River, Little Dominguez Creek. What people come for: Crystal-clear swimming holes along Little Dominguez Creek; Towering sandstone cliffs with dramatic colors. Access is free, and you will find camping. Best visited in June-August. Assess water conditions carefully.
View detailsFrequently asked questions
Can you swim in Colorado lakes?
Yes at designated park swim beaches — Cherry Creek, Chatfield, Boulder Reservoir, Horsetooth, Bear Creek / Big Soda Lake, and similar posted beaches. Many mountain drinking-water reservoirs, including Dillon, ban swimming. Always check the land manager the morning you go.
Can you swim in Dillon Reservoir?
No. Denver Water prohibits swimming, scuba, and water-skiing. You may wade along the shoreline with your feet on the bottom; treading water still counts as swimming and is banned.
What lakes near Denver can you swim in?
Cherry Creek State Park and Chatfield State Park are the usual in-metro beaches (Memorial Day–Labor Day for Cherry Creek’s sandy swim beach). Boulder Reservoir is the Boulder answer (lifeguarded designated area only). Horsetooth is the Fort Collins beach. Dillon is not a swim lake.
Can you swim at Boyd Lake in 2026?
Swimming was still allowed, but Colorado Parks and Wildlife did not install the usual buoyed swim beach because of low water, did not run the usual E. coli testing, and closed boat ramps for the season. Treat it as at-your-own-risk and recheck the CPW page.
What lakes can you swim in in Colorado?
Designated park beaches: Cherry Creek, Chatfield, Boulder Reservoir (lifeguarded area only), Horsetooth, and Bear Creek / Big Soda Lake. Dillon, Antero, Williams Fork, and Cheesman are no-swim Denver Water reservoirs. Confirm 2026 hours — many beaches end at Labor Day.
Where to swim in Colorado if I wanted a lake, not a canyon hole?
Use this page for Front Range park beaches. Wild Front Range holes (Guffey, Queens Canyon) are a different trip — see swimming holes near Denver. Do not treat Dillon as a swim lake.
How many lakes are in Colorado?
Colorado has hundreds of named lakes and reservoirs; only a fraction allow swimming. This guide lists swim-legal Front Range beaches with official park links, not a count of every alpine tarn.
Are alpine lakes in Colorado good for swimming?
Usually no. High lakes are extremely cold, often have no legal swim beach, and some (Hanging Lake) ban water contact. Front Range park beaches are the honest family swim. Canyon swimming holes are a different, colder sport — see our Denver holes guide.