No detected openings were recorded in the last 90 days. Campsite Sniper monitors Sunnyside Campground continuously and will alert you if that changes.
Of the 52 tracked site-nights (Apr 30 – May 3, 2027): 20 open for online reservation · 32 on sites not offered for online reservation (first-come, first-served or administrative). Of the facility's 13 monitored sites, 5 can be reserved online and 8 are first-come, first-served.
Where the open windows are
Load status
Apr 30 – May 3, 2027Of the open site-nights on mapped sites, 5 fall on weekdays and 15 on weekends (Fri–Sun).
Open dates by month
Apr 2027 – May 2027May holds the most room. 15 of 39 site-nights are still open there.
Holiday windows
Sites open per night · of 5 sites| Window | Night | Sites open | Status |
|---|---|---|---|
| Memorial Day | FRI May 28 | 0 | None open |
| SAT May 29 | 0 | None open | |
| SUN May 30 | 0 | None open | |
| MON May 31 | 0 | None open |
Memorial Day: no online availability on any tracked night.
Best-availability sites
Most open site-nights · tracked window| Site | Open site-nights |
|---|---|
| 002 | 4 |
| 003 | 4 |
| 010 | 4 |
| 012 | 4 |
| 013 | 4 |
The 5 sites with the most open site-nights in the current snapshot. Pair a bookable date with a free alert to cover everything else.
Tracked window
CoverageCampsite Sniper's data for this facility starts Apr 30, 2027. That is about 179 days after the current snapshot was taken, so dates before Apr 30, 2027 are not covered by what Campsite Sniper tracks here — they are not known to be unavailable. The site-nights shown on this page describe Apr 30, 2027 onwards only. Check Recreation.gov for earlier dates.
Stays and site detail
Multi-night stays. 5 2-night, 5 3-night openings where a single site is free for every night, per Campsite Sniper's current snapshot — soonest Apr 30, 2027 at site 002.
All 5 sites with current availability
| Site | Max RV | Hookups | Open site-nights | Longest run | Dates |
|---|---|---|---|---|---|
| 002 | 21 ft | None | 4 | 4 nights | Apr 30, 2027, May 1, 2027, May 2, 2027, May 3, 2027 |
| 003 | 21 ft | None | 4 | 4 nights | Apr 30, 2027, May 1, 2027, May 2, 2027, May 3, 2027 |
| 010 | 21 ft | None | 4 | 4 nights | Apr 30, 2027, May 1, 2027, May 2, 2027, May 3, 2027 |
| 012 | 21 ft | None | 4 | 4 nights | Apr 30, 2027, May 1, 2027, May 2, 2027, May 3, 2027 |
| 013 | 21 ft | None | 4 | 4 nights | Apr 30, 2027, May 1, 2027, May 2, 2027, May 3, 2027 |
About Sunnyside Campground
Overview
Sunnyside Campground is located along the southeast side of Cougar Reservoir at 1,700 feet in elevation. A large grove of conifers provides shade to these campsites. Motorhomes and trailers not recommended due to the steep entrance into the campground.
Recreation
Hiking in the area is outstanding in nearby Three Sisters Wilderness, along Rebel Creek. Hikers will enjoy exploring other trails including the French Pete Trail, Box Canyon Trail, Indian Ridge Lookout, and several day hikes within the Cougar Recreation Area. After a fun day on the lake, relax and enjoy Terwilliger Hot Springs, a day use area along Rider Creek.
Facilities
The campground offers vault toilets and garbage collection. Individual campsites include a fire ring and picnic table. Easy access to the lake is possible from this scenic location. There is no water available, campers will need to bring enough for the duration of their stay.
Natural Features
Situated near the South fork of the McKenzie River on the Willamette National Forest, Cougar Reservoir is part of the Cougar Recreation Area. Wildflower and wildlife viewing are abundant.
Getting there
From Blue River, travel 4 miles east on Hwy 126 to Aufderheide Drive (FS road 19). Continue on Aufderheide Drive for 9.5 miles; turn left on FS road 1900-500 for .25 miles.
View on Recreation.gov ↗ Get directions ↗
Photo gallery
FAQ
How do I get a reservation at Sunnyside Campground?
Reservations for Sunnyside Campground are made through Recreation.gov. 20 of 52 tracked site-nights are currently open (38.5%). Pick a site on the map to see its calendar, or set a free Campsite Sniper alert. You complete the reservation yourself on Recreation.gov.
Does Campsite Sniper book this campground for me?
No. Campsite Sniper sends alerts and direct Recreation.gov links. It never books, pays for, holds, hoards, or resells reservations.
How current is this availability data?
Campsite Sniper re-checks public Recreation.gov availability for this facility every hour and republishes whenever anything changes. This facility's data last changed at Nov 2, 2026 18:20 UTC; an older timestamp means nothing has changed since that time, not that checking stopped. Always confirm final availability on Recreation.gov when you book.
Can I get a multi-night stay at Sunnyside Campground?
5 three-night openings are showing, counting only runs where the SAME site is free for all three nights. The soonest starts Apr 30, 2027 at site 002. Confirm and book on Recreation.gov.
Which sites at Sunnyside Campground fit a 35-foot RV?
No RV-analyzable site here has a recorded maximum of 35 ft or more; the longest recorded is 21 ft.
Which month has the most availability at Sunnyside Campground?
May 2027, with 15 open site-nights in the current snapshot of 39.
When is the next open date at Sunnyside Campground?
Campsite Sniper cannot answer that from the current snapshot. The availability data held for Sunnyside Campground begins Apr 30, 2027 — about 179 days after this snapshot was taken, so any earlier dates are outside what Campsite Sniper is tracking here rather than known to be unavailable. Check Recreation.gov for dates before Apr 30, 2027.
Stop refreshing. Let the app watch it.
Lakefront, hookups, your RV length, weekends only - set it as picky as you want.
We run paced availability checks for Sunnyside Campground. One watch covers every matching online-reservable site.
When a match opens, you get a push with a Recreation.gov link so you can review and book it yourself.
Alerts monitor online-reservable inventory only; first-come, first-served sites are not included.