Openings · last 7 days
341
Booking reality
Campsite Sniper detected 341 site openings here in the last 7 days
01 · Detected Opening History · the openings record · file CS-10083831
When Porcupine Flat Campground reopens
Porcupine Flat Campground's openings record: every site-date Campsite Sniper detected turning available, logged and time-stamped. Refreshed hourly.
Openings · last 30 days
758
Openings · last 90 days
758
Weekday pattern
Detected openings by day of week · 90dThursday accounted for the largest share of the openings Campsite Sniper detected. 173 of 758 openings detected in the last 90 days occurred on a Thursday (22.8%), with Tuesday (138) and Monday (135) next in line.
Hour-of-day pattern
First detected by hour · local time · last 90 daysThe largest concentrations of detected openings were first detected during the 05:00 and 12:00 local-time hours. Those hours contained 324 of 758 detected openings (42.7%). 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 14 days before the stay date; the middle 50% land 14–14 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 |
|---|---|---|
| 030 | 18 | 2.4% |
| 001 | 17 | 2.2% |
| 008 | 17 | 2.2% |
| 009 | 17 | 2.2% |
| 013 | 17 | 2.2% |
Site 030 had the most detected openings in the last 90 days: 18. One free watch covers every site here.
02 · Availability Outlook · Sep 18 – Oct 15, 2026 · of 56 monitored sites
Of the 1,292 tracked site-nights (Sep 18 – Oct 15, 2026): 810 open for online reservation · 449 reserved · 29 closed · 4 unavailable (cause unspecified).
Where the open windows are
37.3% of tracked site-nights are not currently open for online reservation. 810 of 1,292 remain open; here is where they are.
Load status
Sep 18 – Oct 15, 2026Not open online37.3%
Open site-nights810 / 1,292
Reserved (of online inventory)449 / 1,259
Weekday openings511
Weekend openings299
Of the open site-nights on mapped sites, 511 fall on weekdays and 299 on weekends (Fri–Sun).
Open dates by month
Sep 2026 – Oct 2026October holds the most room. 483 of 564 site-nights are still open there.
Holiday windows
Sites open per night · of 56 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.
Best-availability sites
Most open site-nights · tracked window| Site | Open site-nights |
|---|---|
| 029 | 20 |
| 004 | 19 |
| 008 | 19 |
| 012 | 19 |
| 016 | 19 |
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.
Next windows
As of Sep 18, 2026 snapshotNext open dateSat · Sep 19
Next open weekendSat · Sep 19
The next bookable night is Sep 19; the first open weekend starts Sep 19. Campsite Sniper can watch later dates for you.
Stays and site detail
810 open site-nights across 55 sites at Porcupine Flat Campground, from the same hourly snapshot as everything above.
Multi-night stays. 116 2-night, 96 3-night, 51 7-night openings where a single site is free for every night, per Campsite Sniper's current snapshot — soonest Sep 19 at site 009.
All 55 sites with current availability
| Site | Max RV | Hookups | Open site-nights | Longest run | Dates |
|---|---|---|---|---|---|
| 029 | 22 ft | None | 20 | 14 nights | Sep 19, Sep 20, Sep 21, Sep 22, Sep 23, Sep 24, Sep 27, Sep 28, Sep 29, Sep 30, Oct 1, Oct 2 +8 more |
| 004 | 13 ft | None | 19 | 14 nights | Sep 20, Sep 21, Sep 22, Sep 23, Sep 24, Sep 27, Sep 28, Sep 29, Sep 30, Oct 1, Oct 2, Oct 3 +7 more |
| 008 | 15 ft | None | 19 | 14 nights | Sep 20, Sep 21, Sep 22, Sep 23, Sep 24, Sep 27, Sep 28, Sep 29, Sep 30, Oct 1, Oct 2, Oct 3 +7 more |
| 012 | 18 ft | None | 19 | 14 nights | Sep 20, Sep 21, Sep 22, Sep 23, Sep 24, Sep 27, Sep 28, Sep 29, Sep 30, Oct 1, Oct 2, Oct 3 +7 more |
| 016 | 18 ft | None | 19 | 14 nights | Sep 20, Sep 21, Sep 22, Sep 23, Sep 24, Sep 27, Sep 28, Sep 29, Sep 30, Oct 1, Oct 2, Oct 3 +7 more |
| 020 | 15 ft | None | 19 | 14 nights | Sep 20, Sep 21, Sep 22, Sep 23, Sep 24, Sep 27, Sep 28, Sep 29, Sep 30, Oct 1, Oct 2, Oct 3 +7 more |
| 023 | 22 ft | None | 19 | 14 nights | Sep 20, Sep 21, Sep 22, Sep 23, Sep 24, Sep 27, Sep 28, Sep 29, Sep 30, Oct 1, Oct 2, Oct 3 +7 more |
| 024 | 22 ft | None | 19 | 14 nights | Sep 20, Sep 21, Sep 22, Sep 23, Sep 24, Sep 27, Sep 28, Sep 29, Sep 30, Oct 1, Oct 2, Oct 3 +7 more |
| 025 | 20 ft | None | 19 | 14 nights | Sep 20, Sep 21, Sep 22, Sep 23, Sep 24, Sep 27, Sep 28, Sep 29, Sep 30, Oct 1, Oct 2, Oct 3 +7 more |
| 021 | 22 ft | None | 18 | 14 nights | Sep 21, Sep 22, Sep 23, Sep 24, Sep 27, Sep 28, Sep 29, Sep 30, Oct 1, Oct 2, Oct 3, Oct 4 +6 more |
| 022 | 22 ft | None | 18 | 11 nights | Sep 20, Sep 21, Sep 22, Sep 23, Sep 24, Sep 27, Sep 28, Sep 30, Oct 1, Oct 2, Oct 3, Oct 4 +6 more |
| 026 | 12 ft | None | 18 | 13 nights | Sep 20, Sep 21, Sep 22, Sep 23, Sep 24, Sep 28, Sep 29, Sep 30, Oct 1, Oct 2, Oct 3, Oct 4 +6 more |
| 027 | 20 ft | None | 18 | 13 nights | Sep 20, Sep 21, Sep 22, Sep 23, Sep 24, Sep 28, Sep 29, Sep 30, Oct 1, Oct 2, Oct 3, Oct 4 +6 more |
| 031 | 15 ft | None | 18 | 14 nights | Sep 20, Sep 21, Sep 22, Sep 23, Sep 27, Sep 28, Sep 29, Sep 30, Oct 1, Oct 2, Oct 3, Oct 4 +6 more |
| 032 | 20 ft | None | 18 | 13 nights | Sep 20, Sep 21, Sep 22, Sep 23, Sep 24, Sep 28, Sep 29, Sep 30, Oct 1, Oct 2, Oct 3, Oct 4 +6 more |
| 048 | 18 ft | None | 18 | 14 nights | Sep 20, Sep 21, Sep 23, Sep 24, Sep 27, Sep 28, Sep 29, Sep 30, Oct 1, Oct 2, Oct 3, Oct 4 +6 more |
| 009 | 20 ft | None | 17 | 10 nights | Sep 19, Sep 20, Sep 21, Sep 22, Sep 23, Sep 24, Sep 27, Oct 1, Oct 2, Oct 3, Oct 4, Oct 5 +5 more |
| 010 | 22 ft | None | 17 | 12 nights | Sep 20, Sep 21, Sep 22, Sep 23, Sep 24, Sep 29, Sep 30, Oct 1, Oct 2, Oct 3, Oct 4, Oct 5 +5 more |
| 011 | 18 ft | None | 17 | 13 nights | Sep 20, Sep 21, Sep 22, Sep 23, Sep 28, Sep 29, Sep 30, Oct 1, Oct 2, Oct 3, Oct 4, Oct 5 +5 more |
| 013 | 15 ft | None | 17 | 14 nights | Sep 20, Sep 21, Sep 22, Sep 27, Sep 28, Sep 29, Sep 30, Oct 1, Oct 2, Oct 3, Oct 4, Oct 5 +5 more |
| 028 | 22 ft | None | 17 | 8 nights | Sep 21, Sep 22, Sep 23, Sep 24, Sep 27, Sep 28, Sep 29, Sep 30, Oct 1, Oct 3, Oct 4, Oct 5 +5 more |
| 030 | 13 ft | None | 17 | 14 nights | Sep 20, Sep 21, Sep 24, Sep 27, Sep 28, Sep 29, Sep 30, Oct 1, Oct 2, Oct 3, Oct 4, Oct 5 +5 more |
| 036 | 15 ft | None | 17 | 11 nights | Sep 20, Sep 21, Sep 22, Sep 23, Sep 24, Sep 27, Sep 30, Oct 1, Oct 2, Oct 3, Oct 4, Oct 5 +5 more |
| 037 | 20 ft | None | 17 | 14 nights | Sep 21, Sep 22, Sep 23, Sep 27, Sep 28, Sep 29, Sep 30, Oct 1, Oct 2, Oct 3, Oct 4, Oct 5 +5 more |
| 053 | 18 ft | None | 17 | 9 nights | Sep 21, Sep 22, Sep 23, Sep 24, Sep 27, Sep 28, Sep 29, Sep 30, Oct 2, Oct 3, Oct 4, Oct 5 +5 more |
| 001 | Not recorded | None | 16 | 11 nights | Sep 20, Sep 22, Sep 23, Sep 27, Sep 28, Sep 30, Oct 1, Oct 2, Oct 3, Oct 4, Oct 5, Oct 6 +4 more |
| 015 | 18 ft | None | 16 | 13 nights | Sep 22, Sep 23, Sep 24, Sep 28, Sep 29, Sep 30, Oct 1, Oct 2, Oct 3, Oct 4, Oct 5, Oct 6 +4 more |
| 055 | 18 ft | None | 16 | 9 nights | Sep 20, Sep 21, Sep 22, Sep 23, Sep 27, Sep 28, Sep 29, Oct 2, Oct 3, Oct 4, Oct 5, Oct 6 +4 more |
| 003 | 20 ft | None | 15 | 13 nights | Sep 21, Sep 24, Sep 28, Sep 29, Sep 30, Oct 1, Oct 2, Oct 3, Oct 4, Oct 5, Oct 6, Oct 7 +3 more |
| 006 | 15 ft | None | 15 | 7 nights | Sep 21, Sep 22, Sep 23, Sep 24, Sep 27, Sep 29, Sep 30, Oct 1, Oct 4, Oct 5, Oct 6, Oct 7 +3 more |
| 014 | 24 ft | None | 15 | 9 nights | Sep 22, Sep 23, Sep 24, Sep 28, Sep 29, Sep 30, Oct 2, Oct 3, Oct 4, Oct 5, Oct 6, Oct 7 +3 more |
| 017 | 20 ft | None | 15 | 7 nights | Sep 20, Sep 21, Sep 22, Sep 23, Sep 24, Sep 27, Sep 28, Sep 29, Oct 4, Oct 5, Oct 6, Oct 7 +3 more |
| 018 | 15 ft | None | 15 | 7 nights | Sep 20, Sep 21, Sep 22, Sep 23, Sep 24, Sep 27, Sep 28, Sep 29, Oct 4, Oct 5, Oct 6, Oct 7 +3 more |
| 019 | 15 ft | None | 15 | 13 nights | Sep 23, Sep 24, Sep 28, Sep 29, Sep 30, Oct 1, Oct 2, Oct 3, Oct 4, Oct 5, Oct 6, Oct 7 +3 more |
| 051 | 18 ft | None | 15 | 9 nights | Sep 21, Sep 23, Sep 24, Sep 28, Sep 29, Sep 30, Oct 2, Oct 3, Oct 4, Oct 5, Oct 6, Oct 7 +3 more |
| 005 | 15 ft | None | 14 | 8 nights | Sep 20, Sep 23, Sep 24, Sep 27, Sep 29, Sep 30, Oct 3, Oct 4, Oct 5, Oct 6, Oct 7, Oct 8 +2 more |
| 042 | 18 ft | None | 14 | 13 nights | Sep 23, Sep 28, Sep 29, Sep 30, Oct 1, Oct 2, Oct 3, Oct 4, Oct 5, Oct 6, Oct 7, Oct 8 +2 more |
| 041 | 22 ft | None | 13 | 9 nights | Sep 23, Sep 24, Sep 27, Sep 28, Oct 2, Oct 3, Oct 4, Oct 5, Oct 6, Oct 7, Oct 8, Oct 9 +1 more |
| 047 | 22 ft | None | 13 | 7 nights | Sep 20, Sep 21, Sep 22, Sep 23, Sep 28, Sep 30, Oct 4, Oct 5, Oct 6, Oct 7, Oct 8, Oct 9 +1 more |
| 039 | 24 ft | None | 12 | 7 nights | Sep 22, Sep 23, Sep 24, Sep 27, Oct 1, Oct 4, Oct 5, Oct 6, Oct 7, Oct 8, Oct 9, Oct 10 |
| 050 | 18 ft | None | 12 | 8 nights | Sep 21, Sep 22, Sep 29, Sep 30, Oct 3, Oct 4, Oct 5, Oct 6, Oct 7, Oct 8, Oct 9, Oct 10 |
| 038 | 22 ft | None | 11 | 6 nights | Sep 20, Sep 21, Sep 22, Sep 23, Oct 1, Oct 5, Oct 6, Oct 7, Oct 8, Oct 9, Oct 10 |
| 043 | 18 ft | None | 11 | 8 nights | Sep 22, Sep 23, Sep 24, Oct 3, Oct 4, Oct 5, Oct 6, Oct 7, Oct 8, Oct 9, Oct 10 |
| 054 | 18 ft | None | 11 | 9 nights | Sep 20, Sep 30, Oct 2, Oct 3, Oct 4, Oct 5, Oct 6, Oct 7, Oct 8, Oct 9, Oct 10 |
| 007 | 20 ft | None | 10 | 7 nights | Sep 21, Sep 22, Sep 27, Oct 4, Oct 5, Oct 6, Oct 7, Oct 8, Oct 9, Oct 10 |
| 034 | 24 ft | None | 10 | 8 nights | Sep 21, Sep 22, Oct 3, Oct 4, Oct 5, Oct 6, Oct 7, Oct 8, Oct 9, Oct 10 |
| 040 | 20 ft | None | 10 | 7 nights | Sep 20, Sep 22, Sep 29, Oct 4, Oct 5, Oct 6, Oct 7, Oct 8, Oct 9, Oct 10 |
| 046 | 18 ft | None | 10 | 7 nights | Sep 20, Sep 27, Oct 1, Oct 4, Oct 5, Oct 6, Oct 7, Oct 8, Oct 9, Oct 10 |
| 049 | 18 ft | None | 10 | 6 nights | Sep 24, Sep 27, Sep 28, Oct 1, Oct 5, Oct 6, Oct 7, Oct 8, Oct 9, Oct 10 |
| 052 | 22 ft | None | 10 | 8 nights | Sep 23, Sep 24, Oct 3, Oct 4, Oct 5, Oct 6, Oct 7, Oct 8, Oct 9, Oct 10 |
| 035A | 22 ft | None | 9 | 7 nights | Sep 20, Sep 21, Oct 4, Oct 5, Oct 6, Oct 7, Oct 8, Oct 9, Oct 10 |
| 045B | 18 ft | None | 9 | 7 nights | Sep 20, Sep 21, Oct 4, Oct 5, Oct 6, Oct 7, Oct 8, Oct 9, Oct 10 |
| 033 | 24 ft | None | 7 | 7 nights | Oct 4, Oct 5, Oct 6, Oct 7, Oct 8, Oct 9, Oct 10 |
| 044 | 18 ft | None | 7 | 6 nights | Sep 23, Oct 5, Oct 6, Oct 7, Oct 8, Oct 9, Oct 10 |
| 045A | 18 ft | None | 3 | 3 nights | Sep 28, Sep 29, Sep 30 |
About Porcupine Flat Campground
Overview
Staying at Porcupine Flat Campground requires reservations. No first come, first serve sites are available.
The campground typically opens in late-June and closes mid-October. The opening date varies depending on the opening of the Tioga Road and related seasonal facility and road work.
Porcupine Flat Campground is located off the Tioga Road about 30 minutes west of Tuolumne Meadows and over an hour from Yosemite Valley. RVs and Trailers are not recommended for the narrow roads in this more primitive campground. At an elevation of 8,100 feet (2,500 m) elevation, the campground is near Porcupine Creek, which is the only water source (must be filtered, treated, or boiled). The Porcupine Creek Trailhead is nearby. There are no visitor services close to the campground.
For additional park information, call (209)372-0200 or visit www.nps.gov/yose
Recreation
Yosemite's trails, cliffs, roads and rivers provide endless recreational activities for any kind of visitor. Hiking, biking, rock climbing, fishing, horseback riding, rafting, auto touring, and photography are all very popular activities within the park. The White Wolf area has hiking and backpacking opportunities that begin near the campground, such as Lukens Lake, Harden Lake and the Grand Canyon of the Tuolumne. The Crane Flat area, 23 miles west, offers many other hiking opportunities such as Tuolumne and Merced Groves of Giant Sequoias, both of which require a 2.5 to 3-mile roundtrip hike to view. Tuolumne Meadows and all it's High Sierra wonder lie 25 miles to the east, where many beautiful day and overnight excursions await.
The Tioga Road offers a 39-mile scenic drive past forests, meadows, lakes, and granite domes. The road’s elevation ranges from 6,200 feet to just under 10,000 feet. Tuolumne Meadows embodies the high-country of the Sierra Nevada and is a good starting point for countless hikes. There is little to no cell service along the road.
Facilities
Porcupine Flat is extremely primitive and has no connectivity or drinking water. Basic amenities include vault toilets, trash/recycling collection, food storage lockers, fire rings and picnic tables.
Wood and charcoal fires are permitted when the campground is open.
For a map of the campground, visit https://www.nps.gov/yose/planyourvisit/porcupinecamp.htm
Natural Features
Yosemite National Park covers nearly 1,200 square miles (3,100 square km) in the Sierra Nevada, with elevations ranging from about 2,000 feet (600 m) to 13,000 ft (4,000 m). Yosemite receives 95% of its precipitation between October and May (and over 75% between November and March). Most of Yosemite is blanketed in snow from about November through May. (The Valley can be rainy or snowy in any given winter storm.)
Porcupine Flat is situated along a seasonal creek which is it's only source of water. Creek water must be treated and/or boiled before consuming.
Nearby Attractions
Just 25 miles away is Yosemite Valley, an awe-inspiring landscape containing many of the famous features for which Yosemite National Park is known. Hiking trails and bike paths are abundant in the valley. Rafting the Merced River is a fun way to cool down on a summer day when water levels are sufficient. Yosemite Valley also offers numerous guided bus tours, educational programs, museums, ranger-led activities, and an art center with workshops.
The Tioga Road offers a 39-mile scenic drive past forests, meadows, lakes and granite domes. Tuolumne Meadows embodies the high-country of the Sierra Nevada, with its broad sub-alpine meadows and granite peaks. Several trailheads line the road offering hikes to beautiful, secluded areas that can only be accessed and enjoyed by foot.
Beautiful Hetch Hetchy Reservoir, just 23 miles from Crane Flat, is home to spectacular scenery and numerous wilderness trailheads.
56 monitored sitesRVs up to 24 ftNo hookupsPets OKFire pitsMax party 6
Getting there
The Porcupine Flat Campground is located off the Tioga Road 24 miles west from Tioga Pass, the park’s east entrance (35 minutes). From Yosemite Valley, take the Big Oak Flat Road and Tioga Road 38 miles (approximately 70 minutes). From Hwy. 120 west/Big Oak Flat Road, take the Big Oak Flat Road and Tioga Road 31 miles (45 minutes). You’ll find the campground north of the Tioga Road.
BackpackingBirdingCampingClimbingFishingHikingPhotographyStar GazingSwimmingWilderness
View on Recreation.gov ↗ Get directions ↗
03 · Field Photos · roll CS-10083831 · facility + sites
Photo gallery
Roll CS-10083831 · Porcupine Flat Campground12 frames · facility + sites
FAQ
How do I get a reservation at Porcupine Flat Campground?
Reservations for Porcupine Flat Campground are made through Recreation.gov. 810 of 1,292 tracked site-nights are currently open (62.7%). Campsite Sniper has also detected 758 site openings here in the last 90 days, so further dates may appear. 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 Sep 18, 2026 16:19 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 Porcupine Flat Campground?
Campsite Sniper detected 341 site-date openings at Porcupine Flat Campground in the last 7 days, 758 over 30 days and 758 over the last 90.
Which day of the week had the most detected openings at Porcupine Flat Campground?
Thursday accounted for the largest share of the openings Campsite Sniper detected in the last 90 days: 173 of 758 (22.8%). Days reflect when Campsite Sniper first detected each opening, not when the change occurred upstream.
Can I get a multi-night stay at Porcupine Flat Campground?
96 three-night openings are showing, counting only runs where the SAME site is free for all three nights. The soonest starts Sep 19 at site 009. Confirm and book on Recreation.gov.
Which sites at Porcupine Flat Campground fit a 35-foot RV?
No RV-analyzable site here has a recorded maximum of 35 ft or more; the longest recorded is 24 ft. 55 of those 56 sites have a recorded maximum length and 1 does not; it is not counted as fitting.
Which month has the most availability at Porcupine Flat Campground?
October 2026, with 483 open site-nights in the current snapshot of 564.
How far ahead of a stay do openings appear at Porcupine Flat Campground?
Half of the openings Campsite Sniper detected appeared at least 14 days before the stay date; the middle 50% landed 14-14 days out. Campsite Sniper can monitor future changes for dates you select.
When is the next open date at Porcupine Flat Campground?
As of the Sep 18, 2026 snapshot: the next open date is Sat, Sep 19 and the next open weekend starts Sat, Sep 19. Detected openings can add earlier dates at any time; a free Campsite Sniper alert catches those the moment they appear.
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