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Diamond Lake
Managing agency
U.S. Forest Service
Overnight sites
244
Reservations
Reservable
State
Oregon
Federal facility. Listed from the Recreation.gov RIDB export; amenities, photos and current availability live on the Recreation.gov page.
Diamond Lake is a U.S. Forest Service campground in Oregon, in the Idleyld Park area. It lists 244 overnight sites, and it is reservable through Recreation.gov.
Site counts, open seasons and reservation windows change through the year, so confirm the current details and book directly on the campground's Recreation.gov page. This listing reflects federal Recreation.gov (RIDB) data only.
All federal campgrounds in Oregon → · More U.S. Forest Service campgrounds →
Federal RIDB data, verified June 2026. How we compile this.