Island Lake (RMNP)
Lake · Colorado
ℹ️ Community-reported spot. Details below are compiled from public sources and are reported to be accurate — always verify locally before visiting.
About this swimming hole
A small, clear alpine lake in the RMNP backcountry with a rocky shoreline made for a quick plunge. Island Lake rewards hikers on the Flattop Mountain trail with solitude and cold, clean water. The swim is short; the bragging rights are long.
Good to know
| Water type | Lake |
|---|---|
| Water temperature | very cold |
| Depth | alpine lake; swim near shore |
| Best season | July-September |
| Fees | RMNP entry fee |
| Reservations required | No |
| Hours | sunrise-sunset |
| Parking | Trailhead lot |
| County | Larimer County |
| Nearest town | Estes Park |
| Safety notes | No lifeguard; very cold; altitude |
Map
Nearby swimming holes
Frequently asked questions
Does Island Lake (RMNP) require reservations?
No reservations are required at Island Lake (RMNP) based on current information — but verify before you go.
Is there a fee to visit Island Lake (RMNP)?
Reported fee info: RMNP entry fee. Fees can change — confirm with the official link.
When is the best time to visit Island Lake (RMNP)?
The best season is typically July-September.
⚠️ Verify before you go. Conditions, fees, reservations, and access can change — confirm details with the official link before visiting. Last verified: September 2026