Alder Flats, North Santiam
River · Oregon
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 less-visited North Santiam swimming stretch east of Detroit that rewards drivers willing to pull over and explore. The same turquoise glacial water as the famous holes, minus the permit system and the lines.
Good to know
| Water type | River |
|---|---|
| Water temperature | 50-55 in summer |
| Best season | July-September |
| Fees | Free |
| Reservations required | No |
| Hours | daylight hours |
| Parking | pullouts along the highway |
| County | Marion County |
| Nearest town | Detroit |
| Safety notes | no lifeguard; cold swift river; unimproved access |
Map
Nearby swimming holes
Frequently asked questions
Does Alder Flats, North Santiam require reservations?
No reservations are required at Alder Flats, North Santiam based on current information — but verify before you go.
Is there a fee to visit Alder Flats, North Santiam?
Reported fee info: Free. Fees can change — confirm with the official link.
When is the best time to visit Alder Flats, North Santiam?
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