Harmon Lake beach
Lake · North Dakota
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
Harmon Lake's swim beach sits in a scenic coulee north of Mandan, with the lake's clear water and sandy beach drawing Bismarck-Mandan families. The recreation area's trails and archery range add variety. It is the capital region's closest lake swim.
Good to know
| Water type | Lake |
|---|---|
| Water temperature | low 70s in summer |
| Depth | shallow beach entry |
| Best season | June-August |
| Fees | Free |
| Reservations required | No |
| Parking | recreation area lots |
| Amenities | swim beach, campground, trails, archery range |
| County | Morton County |
| Nearest town | Mandan |
| Safety notes | no lifeguard |
Map
Nearby swimming holes
Frequently asked questions
Does Harmon Lake beach require reservations?
No reservations are required at Harmon Lake beach based on current information — but verify before you go.
Is there a fee to visit Harmon Lake beach?
Reported fee info: Free. Fees can change — confirm with the official link.
When is the best time to visit Harmon Lake beach?
The best season is typically June-August.
⚠️ Verify before you go. Conditions, fees, reservations, and access can change — confirm details with the official link before visiting. Last verified: September 2026