Hidden Lake, North Cascades
Lake · Washington
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 turquoise alpine lake near Marblemount earned by a steep 4.5-mile, 3,300-foot climb into the North Cascades backcountry. The serenity and the glacier views make it one of the prettiest alpine swims in the state for those willing to hike for it.
Good to know
| Water type | Lake |
|---|---|
| Water temperature | 45-50 in summer |
| Best season | July-August |
| Fees | NPS pass or NW Forest Pass |
| Reservations required | No |
| Hours | daylight hours |
| Parking | Hidden Lake trailhead lot |
| County | Skagit County |
| Nearest town | Marblemount |
| Safety notes | no lifeguard; strenuous hike; frigid water; wilderness |
Map
Nearby swimming holes
Frequently asked questions
Does Hidden Lake, North Cascades require reservations?
No reservations are required at Hidden Lake, North Cascades based on current information — but verify before you go.
Is there a fee to visit Hidden Lake, North Cascades?
Reported fee info: NPS pass or NW Forest Pass. Fees can change — confirm with the official link.
When is the best time to visit Hidden Lake, North Cascades?
The best season is typically July-August.
⚠️ Verify before you go. Conditions, fees, reservations, and access can change — confirm details with the official link before visiting. Last verified: September 2026