Trillium
Sold out? Sites at Trillium open up when campers cancel.
Campsite Tonight watches Recreation.gov 24/7 and adds an open site to your cart automatically — you just check out.
At a Glance
About Trillium
Trillium is a national park campground at Mt. Hood National Forest in Clackamas County, Oregon. Reservations are managed through Recreation.gov. Campsite Tonight watches Mt. Hood National Forest around the clock and automatically adds an open site to your Recreation.gov cart the moment a cancellation appears — so you just check out.
Trillium is in very high demand — sites here routinely sell out well in advance. Cancellations are often the best way in, which is exactly what Campsite Tonight watches for.
The campground accommodates RVs and trailers up to 100 ft.
Other campgrounds at Mt. Hood National Forest include Still Creek, Frog Lake, Clear Lake (or), Camp Creek and Clear Lake Cabin Lookout.
Total reservations in May — 2023: 296 · 2024: 198 · 2025: 191
Location
Address
Clackamas County, Oregon
Coordinates
45.2707, -121.7345
Very high demand - sites typically fill up immediately when the booking window opens. Plan to book the moment reservations open.
- •July sees 966 reservations - book early or set cancellation alerts.
Nearby Campgrounds
Still Creek
Mt. Hood National Forest
Frog Lake
Mt. Hood National Forest
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Clear Lake (or)
Mt. Hood National Forest
Camp Creek
Mt. Hood National Forest
Clear Lake Cabin Lookout
Mt. Hood National Forest
Little Crater Lake
Mt. Hood National Forest
Photos
Trillium FAQ
How far in advance should I book Trillium?
Very high demand - sites typically fill up immediately when the booking window opens. Plan to book the moment reservations open. Mark your calendar for when the booking window opens (typically 5-6 months ahead). Also set alerts - cancellations do happen.
What is the busiest time at Trillium?
July typically sees the highest reservation activity at Trillium. During peak times, 100% of reservations are made 2+ weeks in advance.
Are there campsites available at Trillium right now?
Trillium is currently fully booked for the next 14 days. However, cancellations happen frequently - download the Campsite Tonight app to get instant alerts when sites become available.
How often is availability checked at Trillium?
Campsite Tonight monitors Trillium for cancellations and new availability as fast as every 29 sec. When a site opens up, users with alerts enabled receive instant notifications so they can book before others.
Where is Trillium located?
Trillium is located in Mt. Hood National Forest, Oregon.
Track Availability at Trillium
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