Openings · last 7 days
29
Booking reality
Campsite Sniper detected 29 site openings here in the last 7 days
01 · Detected Opening History · the openings record · file CS-232831
When Trillium reopens
Trillium's openings record: every site-date Campsite Sniper detected turning available, logged and time-stamped. Refreshed hourly.
Openings · last 30 days
71
Openings · last 90 days
75
Weekday pattern
Detected openings by day of week · 90dNo strong weekday pattern is evident in the openings Campsite Sniper has detected: 75 openings spread across the week.
Hour-of-day pattern
First detected by hour · local time · last 90 daysThe largest concentrations of detected openings were first detected during the 18:00 and 19:00 local-time hours. Those hours contained 18 of 75 detected openings (24.0%). Hours show when Campsite Sniper first detected each opening, in Pacific Time, not when the change was made upstream.
Lead-time profile
Days before stay date · percentilesHalf of the openings Campsite Sniper detected appeared at least 17 days before the stay date; the middle 50% land 8.5–33 days out. Set an alert if you want Campsite Sniper to monitor future openings.
Highest-churn sites
Most openings · 90d| Site | Openings | Share of all openings |
|---|---|---|
| 014 | 5 | 6.7% |
| 011 | 5 | 6.7% |
| 003 | 4 | 5.3% |
| 039 | 4 | 5.3% |
| 006 | 4 | 5.3% |
Site 014 had the most detected openings in the last 90 days: 5. One free watch covers every site here.
02 · Availability Outlook · Sep 18 – Oct 13, 2026 · of 50 monitored sites
Of the 1,300 tracked site-dates (Sep 18 – Oct 13, 2026): 557 open for online reservation · 671 reserved · 72 on sites not offered for online reservation (first-come, first-served or administrative).
Where the open windows are
57.2% of tracked site-dates are not currently open for online reservation. 557 of 1,300 remain open; here is where they are.
Load status
Sep 18 – Oct 13, 2026Not open online57.2%
Open site-dates557 / 1,300
Reserved (of online inventory)671 / 1,228
Weekday openings406
Weekend openings104
Of the open site-nights on mapped sites, 406 fall on weekdays and 104 on weekends (Fri–Sun). The split covers the 510 open site-nights on mapped sites; 557 site-dates are open across all monitored inventory.
Open dates by month
Sep 2026 – Oct 2026October holds the most room. 374 of 650 site-dates are still open there.
Holiday windows
Sites open per night · of 47 sites| Window | Night | Sites open | Status |
|---|---|---|---|
| Labor Day | SAT Sep 5 | 0 | None open |
| SUN Sep 6 | 0 | None open | |
| MON Sep 7 | 0 | None open |
Labor Day: no online availability on any tracked night.
Holiday windows — day use
Units open per date · of 2 day-use units| Window | Date | Units open | Status |
|---|---|---|---|
| Labor Day | SAT Sep 5 | 0 | None open |
| SUN Sep 6 | 0 | None open | |
| MON Sep 7 | 0 | None open |
Labor Day: no online availability on any tracked date.
Best-availability sites
Most open site-nights · tracked window| Site | Open site-nights |
|---|---|
| 048A | 19 |
| 057 | 19 |
| 050 | 17 |
| 025 | 16 |
| 027 | 16 |
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.
Availability by day-use unit
Most open reservation dates · tracked window| Unit | Open reservation dates |
|---|---|
| Day Use Amphitheater | 19 |
| PS1-Day Use | 18 |
The 2 day-use units with the most open reservation dates in the current snapshot. Pair a bookable date with a free alert to cover everything else.
Next windows
As of Sep 18, 2026 snapshotNext open dateWed · Sep 23
Next open weekendFri · Sep 25
The next bookable night is Sep 23; the first open weekend starts Sep 25. Campsite Sniper can watch later dates for you.
Stays and site detail
510 open site-nights across 47 sites at Trillium, from the same hourly snapshot as everything above.
48 overnight sites and 2 day-use units are represented in the current inventory. Day-use units are excluded from every night-based figure on this page — site-nights, longest runs, multi-night stays, holiday stays and RV fit; their reservation dates are listed separately below.
Multi-night stays. 122 2-night, 64 3-night, 13 7-night openings where a single site is free for every night, per Campsite Sniper's current snapshot — soonest Sep 23 at site 052.
RV length. Longest recorded site here is 95 ft. 28 sites take 25 ft, 14 sites take 35 ft, 12 sites take 40 ft. 14 sites of 47 have no recorded maximum and are not counted.
All 47 sites with current availability
| Site | Max RV | Hookups | Open site-nights | Longest run | Dates |
|---|---|---|---|---|---|
| 048A | 95 ft | None | 19 | 17 nights | Sep 23, Sep 24, Sep 27, Sep 28, Sep 29, Sep 30, Oct 1, Oct 2, Oct 3, Oct 4, Oct 5, Oct 6 +7 more |
| 057 | Not recorded | None | 19 | 17 nights | Sep 23, Sep 24, Sep 27, Sep 28, Sep 29, Sep 30, Oct 1, Oct 2, Oct 3, Oct 4, Oct 5, Oct 6 +7 more |
| 050 | Not recorded | None | 17 | 10 nights | Sep 23, Sep 24, Sep 27, Sep 28, Sep 29, Sep 30, Oct 1, Oct 4, Oct 5, Oct 6, Oct 7, Oct 8 +5 more |
| 025 | 30 ft | None | 16 | 10 nights | Sep 24, Sep 27, Sep 28, Sep 29, Sep 30, Oct 1, Oct 4, Oct 5, Oct 6, Oct 7, Oct 8, Oct 9 +4 more |
| 027 | 40 ft | None | 16 | 9 nights | Sep 23, Sep 24, Sep 27, Sep 28, Sep 29, Sep 30, Oct 1, Oct 5, Oct 6, Oct 7, Oct 8, Oct 9 +4 more |
| 036 | Not recorded | None | 16 | 9 nights | Sep 23, Sep 24, Sep 27, Sep 28, Sep 29, Sep 30, Oct 1, Oct 5, Oct 6, Oct 7, Oct 8, Oct 9 +4 more |
| 052 | Not recorded | None | 16 | 9 nights | Sep 23, Sep 24, Sep 25, Sep 26, Sep 27, Sep 28, Sep 29, Sep 30, Oct 1, Oct 4, Oct 5, Oct 6 +4 more |
| 026 | 20 ft | None | 15 | 10 nights | Sep 27, Sep 28, Sep 29, Sep 30, Oct 1, Oct 4, Oct 5, Oct 6, Oct 7, Oct 8, Oct 9, Oct 10 +3 more |
| 014 | Not recorded | None | 14 | 10 nights | Sep 28, Sep 29, Sep 30, Oct 1, Oct 4, Oct 5, Oct 6, Oct 7, Oct 8, Oct 9, Oct 10, Oct 11 +2 more |
| 018 | 30 ft | None | 14 | 10 nights | Sep 23, Sep 28, Sep 29, Sep 30, Oct 4, Oct 5, Oct 6, Oct 7, Oct 8, Oct 9, Oct 10, Oct 11 +2 more |
| 019 | Not recorded | None | 14 | 5 nights | Sep 23, Sep 24, Sep 27, Sep 28, Sep 29, Sep 30, Oct 1, Oct 4, Oct 5, Oct 6, Oct 7, Oct 8 +2 more |
| 024 | 30 ft | None | 14 | 5 nights | Sep 23, Sep 24, Sep 27, Sep 28, Sep 29, Sep 30, Oct 1, Oct 4, Oct 5, Oct 6, Oct 7, Oct 8 +2 more |
| 035 | 26 ft | None | 14 | 5 nights | Sep 23, Sep 24, Sep 27, Sep 28, Sep 29, Sep 30, Oct 1, Oct 4, Oct 5, Oct 6, Oct 7, Oct 8 +2 more |
| 049 | 20 ft | None | 14 | 10 nights | Sep 24, Sep 27, Sep 30, Oct 1, Oct 4, Oct 5, Oct 6, Oct 7, Oct 8, Oct 9, Oct 10, Oct 11 +2 more |
| 054 | Not recorded | None | 14 | 5 nights | Sep 23, Sep 24, Sep 27, Sep 28, Sep 29, Sep 30, Oct 1, Oct 4, Oct 5, Oct 6, Oct 7, Oct 8 +2 more |
| 056 | Not recorded | None | 14 | 10 nights | Sep 27, Sep 28, Sep 29, Oct 1, Oct 4, Oct 5, Oct 6, Oct 7, Oct 8, Oct 9, Oct 10, Oct 11 +2 more |
| 017 | 40 ft | None | 13 | 5 nights | Sep 23, Sep 24, Sep 28, Sep 29, Sep 30, Oct 1, Oct 4, Oct 5, Oct 6, Oct 7, Oct 8, Oct 12 +1 more |
| 034 | 80 ft | None | 13 | 5 nights | Sep 23, Sep 24, Sep 27, Sep 28, Sep 29, Sep 30, Oct 4, Oct 5, Oct 6, Oct 7, Oct 8, Oct 12 +1 more |
| 046 | Not recorded | None | 13 | 5 nights | Sep 24, Sep 27, Sep 28, Sep 29, Sep 30, Oct 1, Oct 4, Oct 5, Oct 6, Oct 7, Oct 8, Oct 12 +1 more |
| 051 | 20 ft | None | 13 | 5 nights | Sep 24, Sep 27, Sep 28, Sep 29, Sep 30, Oct 1, Oct 4, Oct 5, Oct 6, Oct 7, Oct 8, Oct 12 +1 more |
| 021 | 40 ft | None | 12 | 5 nights | Sep 23, Sep 24, Sep 27, Sep 30, Oct 1, Oct 4, Oct 5, Oct 6, Oct 7, Oct 8, Oct 12, Oct 13 |
| 030 | 30 ft | None | 12 | 7 nights | Sep 23, Sep 24, Sep 28, Sep 29, Sep 30, Oct 1, Oct 2, Oct 3, Oct 4, Oct 11, Oct 12, Oct 13 |
| 047 | Not recorded | None | 12 | 5 nights | Sep 23, Sep 28, Sep 29, Sep 30, Oct 1, Oct 4, Oct 5, Oct 6, Oct 7, Oct 8, Oct 12, Oct 13 |
| 028 | 35 ft | None | 11 | 5 nights | Sep 28, Sep 29, Sep 30, Oct 1, Oct 4, Oct 5, Oct 6, Oct 7, Oct 8, Oct 12, Oct 13 |
| 042 | Not recorded | None | 11 | 5 nights | Sep 23, Sep 29, Sep 30, Oct 1, Oct 4, Oct 5, Oct 6, Oct 7, Oct 8, Oct 12, Oct 13 |
| 044 | Not recorded | None | 11 | 4 nights | Sep 23, Sep 24, Sep 27, Sep 29, Sep 30, Oct 4, Oct 5, Oct 6, Oct 7, Oct 12, Oct 13 |
| 045 | Not recorded | None | 11 | 5 nights | Sep 27, Sep 28, Sep 29, Sep 30, Oct 1, Oct 5, Oct 6, Oct 7, Oct 8, Oct 12, Oct 13 |
| 015 | 20 ft | None | 10 | 5 nights | Sep 23, Sep 24, Sep 30, Oct 1, Oct 4, Oct 5, Oct 6, Oct 7, Oct 8, Oct 13 |
| 016 | 60 ft | None | 10 | 5 nights | Sep 29, Sep 30, Oct 1, Oct 4, Oct 5, Oct 6, Oct 7, Oct 8, Oct 12, Oct 13 |
| 020 | 40 ft | None | 10 | 5 nights | Sep 23, Sep 29, Sep 30, Oct 1, Oct 4, Oct 5, Oct 6, Oct 7, Oct 8, Oct 13 |
| 022 | 40 ft | None | 10 | 4 nights | Sep 27, Sep 28, Sep 29, Sep 30, Oct 4, Oct 5, Oct 6, Oct 7, Oct 12, Oct 13 |
| 023 | 35 ft | None | 10 | 4 nights | Sep 24, Sep 27, Sep 30, Oct 1, Oct 4, Oct 5, Oct 6, Oct 7, Oct 12, Oct 13 |
| 033 | 30 ft | None | 9 | 5 nights | Sep 29, Sep 30, Oct 4, Oct 5, Oct 6, Oct 7, Oct 8, Oct 12, Oct 13 |
| 040 | Not recorded | None | 9 | 5 nights | Sep 23, Sep 24, Oct 4, Oct 5, Oct 6, Oct 7, Oct 8, Oct 12, Oct 13 |
| 053 | 26 ft | None | 9 | 3 nights | Sep 24, Sep 28, Sep 29, Sep 30, Oct 6, Oct 7, Oct 8, Oct 12, Oct 13 |
| 055 | 26 ft | None | 9 | 4 nights | Sep 27, Sep 30, Oct 1, Oct 4, Oct 5, Oct 6, Oct 7, Oct 12, Oct 13 |
| 032 | 40 ft | None | 8 | 3 nights | Sep 23, Sep 27, Sep 29, Sep 30, Oct 1, Oct 4, Oct 12, Oct 13 |
| 007 | 20 ft | None | 6 | 2 nights | Sep 30, Oct 1, Oct 4, Oct 8, Oct 12, Oct 13 |
| 037 | 26 ft | None | 6 | 3 nights | Oct 4, Oct 5, Oct 6, Oct 8, Oct 12, Oct 13 |
| 041 | 25 ft | None | 5 | 2 nights | Oct 4, Oct 5, Oct 8, Oct 12, Oct 13 |
| 008 | 30 ft | None | 4 | 2 nights | Oct 1, Oct 5, Oct 12, Oct 13 |
| 011 | 40 ft | None | 4 | 2 nights | Oct 7, Oct 8, Oct 12, Oct 13 |
| 039 | 30 ft | None | 4 | 2 nights | Oct 5, Oct 6, Oct 12, Oct 13 |
| 003 | 40 ft | None | 3 | 1 night | Sep 28, Oct 4, Oct 6 |
| 043 | 25 ft | None | 3 | 2 nights | Oct 5, Oct 6, Oct 13 |
| 006 | 30 ft | None | 2 | 2 nights | Oct 12, Oct 13 |
| 004 | 40 ft | None | 1 | 1 night | Oct 4 |
Day-use inventory
37 available reservation dates across 2 day-use units. Day-use inventory is reserved by the date, so it carries no stay length.
All 2 day-use units with current availability
| Unit | Open reservation dates | Consecutive dates | Dates |
|---|---|---|---|
| Day Use Amphitheater | 19 | 15 dates | Sep 23, Sep 24, Sep 25, Sep 26, Sep 27, Sep 28, Sep 29, Sep 30, Oct 1, Oct 2, Oct 3, Oct 4 +7 more |
| PS1-Day Use | 18 | 12 dates | Sep 23, Sep 24, Sep 25, Sep 28, Sep 29, Sep 30, Oct 1, Oct 2, Oct 3, Oct 4, Oct 5, Oct 6 +6 more |
About Trillium
Overview
Trillium Lake Campground is a beautiful and popular campground not far from the quaint town of Government Camp. It provides spectacular views of majestic Mt. Hood, Oregon's highest point. The campground is well-known for its scenery and abundant recreational opportunities, as well as being a great, family-friendly place to camp.
Recreation
Boating, swimming and fishing are popular on 63-acre Trillium Lake. A small boat ramp is available within the campground and a larger ramp is available in the nearby day-use area. An accessible fishing pier is also available. Anglers cast for a variety of trout.
The 2-mile Trillium Shoreline Trail circles the lake, and parts of it are accessible. Visitors also enjoy hiking and biking on other trails in the vicinity. Tours of the area's historical sites are also popular.
Facilities
The campground offers dozens of single and double sites for tent and RV camping. Some first-come, first-served sites are available, as well as some fully accessible sites. Parking surfaces are mostly paved, but some are gravel.
Each site is equipped with a table and campfire ring with grill. Accessible vault toilets and drinking water are provided. An accessible picnic shelter is adjacent and can accommodate up to 30 people. Parking is available.
An accessible amphitheater within the campground can be reserved for day use and can accommodate up to 30 people. Educational programs are held on weekends throughout the summer.
Natural Features
The campground is located about 40 miles southeast of Portland, in the Mt. Hood National Forest. It sits alongside Trillium Lake at an elevation of 3,600 feet, and is nestled in a shady, mixed conifer forest that provides privacy between campsites.
50 monitored sitesRVs up to 95 ftNo hookups36 shadedWaterfrontLakefrontPets OKMax party 12
Getting there
From Portland, travel southeast on Highway 26 for about 40 miles. Turn right a mile east of Government Camp. Continue 2 miles to the campground entrance.
Mt. Hood, OR503-630-5721
CampingDay Use AreaFishingHikingHistoric & Cultural SiteInterpretive ProgramsSwimming Site
View on Recreation.gov ↗ Get directions ↗
03 · Field Photos · roll CS-232831 · facility
Photo gallery
Roll CS-232831 · Trillium · OR5 frames · facility
FAQ
How do I get a reservation at Trillium?
Reservations for Trillium are made through Recreation.gov. 557 of 1,300 tracked site-dates are currently open (42.8%). Campsite Sniper has also detected 75 site openings here in the last 90 days, so further dates may appear. Pick a site or unit 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 facility 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 Sep 18, 2026 15:19 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.
How often do new openings appear at Trillium?
Campsite Sniper detected 29 site-date openings at Trillium in the last 7 days, 71 over 30 days and 75 over the last 90.
Can I get a multi-night stay at Trillium?
64 three-night openings are showing, counting only runs where the SAME site is free for all three nights. The soonest starts Sep 23 at site 052. Confirm and book on Recreation.gov.
Which sites at Trillium fit a 35-foot RV?
14 of the 47 sites that support RV analysis have a recorded maximum of 35 ft or more; the longest recorded is 95 ft. 33 of those 47 sites have a recorded maximum length and 14 do not; they are not counted as fitting.
Which month has the most availability at Trillium?
October 2026, with 374 open site-dates in the current snapshot of 650.
How far ahead of a stay do openings appear at Trillium?
Half of the openings Campsite Sniper detected appeared at least 17 days before the stay date; the middle 50% landed 8.5-33 days out. Campsite Sniper can monitor future changes for dates you select.
When is the next open date at Trillium?
As of the Sep 18, 2026 snapshot: the next open date is Wed, Sep 23 and the next open weekend starts Fri, Sep 25. Detected openings can add earlier dates at any time; a free Campsite Sniper alert catches those the moment they appear.
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