Openings · last 7 days
221
Booking reality
Campsite Sniper detected 221 site openings here in the last 7 days
01 · Detected Opening History · the openings record · file CS-259309
When Lewis Lake Campground reopens
Lewis Lake Campground's openings record: every site-date Campsite Sniper detected turning available, logged and time-stamped. Refreshed hourly.
Openings · last 30 days
268
Openings · last 90 days
270
Weekday pattern
Detected openings by day of week · 90dWednesday accounted for the largest share of the openings Campsite Sniper detected. 66 of 270 openings detected in the last 90 days occurred on a Wednesday (24.4%), with Friday (41) and Thursday (40) 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 06:00 and 14:00 local-time hours. Those hours contained 116 of 270 detected openings (43.0%). Hours show when Campsite Sniper first detected each opening, in Mountain 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 6–14 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 |
|---|---|---|
| Lewis Lake site #51 | 13 | 4.8% |
| Lewis Lake site #46 | 12 | 4.4% |
| Lewis Lake site #72 | 9 | 3.3% |
| Lewis Lake site #24 | 8 | 3.0% |
| Lewis Lake site #47 | 8 | 3.0% |
Site Lewis Lake site #51 had the most detected openings in the last 90 days: 13. One free watch covers every site here.
02 · Availability Outlook · Sep 18 – Oct 13, 2026 · of 81 monitored sites
Of the 2,020 tracked site-nights (Sep 18 – Oct 13, 2026): 164 open for online reservation · 1,375 reserved · 401 closed · 80 unavailable (cause unspecified).
Where the open windows are
91.9% of tracked site-nights are not currently open for online reservation. 164 of 2,020 remain open; here is where they are.
Load status
Sep 18 – Oct 13, 2026Not open online91.9%
Open site-nights164 / 2,020
Reserved (of online inventory)1,375 / 1,539
Weekday openings103
Weekend openings61
Of the open site-nights on mapped sites, 103 fall on weekdays and 61 on weekends (Fri–Sun).
Open dates by month
Sep 2026 – Oct 2026October holds the most room. 110 of 967 site-nights are still open there.
Holiday windows
Sites open per night · of 81 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 |
|---|---|
| Lewis Lake site #45 | 11 |
| Lewis Lake site #30 | 10 |
| Lewis Lake site #46 | 10 |
| Lewis Lake site #41 | 9 |
| Lewis Lake site #35 | 8 |
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 dateSun · Sep 20
Next open weekendSat · Oct 3
The next bookable night is Sep 20; the first open weekend starts Oct 3. Campsite Sniper can watch later dates for you.
Stays and site detail
164 open site-nights across 58 sites at Lewis Lake Campground, from the same hourly snapshot as everything above.
Multi-night stays. 24 2-night, 9 3-night, 7 7-night openings where a single site is free for every night, per Campsite Sniper's current snapshot — soonest Sep 22 at site Lewis Lake site #44.
RV length. Longest recorded site here is 25 ft. 12 sites take 25 ft.
All 58 sites with current availability
| Site | Max RV | Hookups | Open site-nights | Longest run | Dates |
|---|---|---|---|---|---|
| Lewis Lake site #45 | 18 ft | None | 11 | 9 nights | Sep 29, Sep 30, Oct 3, Oct 4, Oct 5, Oct 6, Oct 7, Oct 8, Oct 9, Oct 10, Oct 11 |
| Lewis Lake site #30 | 20 ft | None | 10 | 8 nights | Sep 29, Sep 30, Oct 4, Oct 5, Oct 6, Oct 7, Oct 8, Oct 9, Oct 10, Oct 11 |
| Lewis Lake site #46 | 16 ft | None | 10 | 9 nights | Sep 20, Oct 3, Oct 4, Oct 5, Oct 6, Oct 7, Oct 8, Oct 9, Oct 10, Oct 11 |
| Lewis Lake site #41 | 21 ft | None | 9 | 9 nights | Oct 3, Oct 4, Oct 5, Oct 6, Oct 7, Oct 8, Oct 9, Oct 10, Oct 11 |
| Lewis Lake site #35 | 20 ft | None | 8 | 8 nights | Oct 4, Oct 5, Oct 6, Oct 7, Oct 8, Oct 9, Oct 10, Oct 11 |
| Lewis Lake site #32 | 19 ft | None | 7 | 7 nights | Oct 5, Oct 6, Oct 7, Oct 8, Oct 9, Oct 10, Oct 11 |
| Lewis Lake site #33 | 17 ft | None | 7 | 7 nights | Oct 5, Oct 6, Oct 7, Oct 8, Oct 9, Oct 10, Oct 11 |
| Lewis Lake site #38 | 24 ft | None | 6 | 2 nights | Sep 30, Oct 3, Oct 5, Oct 8, Oct 10, Oct 11 |
| Lewis Lake site #24 | 21 ft | None | 4 | 1 night | Oct 3, Oct 5, Oct 7, Oct 10 |
| Lewis Lake site #44 | 24 ft | None | 4 | 2 nights | Sep 22, Sep 23, Sep 30, Oct 11 |
| Lewis Lake site #9 | 17 ft | None | 4 | 2 nights | Sep 28, Oct 6, Oct 10, Oct 11 |
| Lewis Lake site #12 | 13 ft | None | 3 | 1 night | Oct 6, Oct 8, Oct 11 |
| Lewis Lake site #19 | 20 ft | None | 3 | 2 nights | Oct 6, Oct 7, Oct 11 |
| Lewis Lake site #23 | 16 ft | None | 3 | 1 night | Oct 6, Oct 8, Oct 11 |
| Lewis Lake site #39 | 17 ft | None | 3 | 1 night | Oct 3, Oct 8, Oct 11 |
| Lewis Lake site #42 | 25 ft | None | 3 | 1 night | Oct 3, Oct 8, Oct 11 |
| Lewis Lake site #55 | 19 ft | None | 3 | 1 night | Sep 23, Sep 28, Sep 30 |
| Lewis Lake site #57 | 21 ft | None | 3 | 3 nights | Sep 28, Sep 29, Sep 30 |
| Lewis Lake site #68 | 18 ft | None | 3 | 2 nights | Sep 23, Sep 29, Sep 30 |
| Lewis Lake site #72 | 19 ft | None | 3 | 3 nights | Sep 28, Sep 29, Sep 30 |
| Lewis Lake site #78 | 18 ft | None | 3 | 2 nights | Sep 24, Sep 29, Sep 30 |
| Lewis Lake site #16 | 17 ft | None | 2 | 2 nights | Oct 10, Oct 11 |
| Lewis Lake site #18 | 20 ft | None | 2 | 1 night | Oct 6, Oct 11 |
| Lewis Lake site #22 | 25 ft | None | 2 | 2 nights | Oct 5, Oct 6 |
| Lewis Lake site #36 | 19 ft | None | 2 | 1 night | Oct 5, Oct 11 |
| Lewis Lake site #37 | 25 ft | None | 2 | 1 night | Oct 5, Oct 11 |
| Lewis Lake site #40 | 20 ft | None | 2 | 2 nights | Oct 10, Oct 11 |
| Lewis Lake site #43 | 17 ft | None | 2 | 1 night | Oct 3, Oct 7 |
| Lewis Lake site #47 | 17 ft | None | 2 | 2 nights | Sep 29, Sep 30 |
| Lewis Lake site #5 | 18 ft | None | 2 | 2 nights | Oct 10, Oct 11 |
| Lewis Lake site #51 | 25 ft | None | 2 | 2 nights | Sep 29, Sep 30 |
| Lewis Lake site #66 | 20 ft | None | 2 | 1 night | Sep 23, Sep 29 |
| Lewis Lake site #70 | 20 ft | None | 2 | 2 nights | Sep 29, Sep 30 |
| Lewis Lake site #71 | 21 ft | None | 2 | 1 night | Sep 21, Sep 30 |
| Lewis Lake site #73 | 18 ft | None | 2 | 1 night | Sep 23, Sep 30 |
| Lewis Lake site #75 | 12 ft | None | 2 | 1 night | Sep 23, Sep 29 |
| Lewis Lake site #8 | 22 ft | None | 2 | 1 night | Oct 7, Oct 10 |
| Lewis Lake site #81 | 20 ft | None | 2 | 1 night | Sep 23, Sep 30 |
| Lewis Lake site #10 | 17 ft | None | 1 | 1 night | Oct 6 |
| Lewis Lake site #14 | 15 ft | None | 1 | 1 night | Oct 8 |
| Lewis Lake site #15 | 15 ft | None | 1 | 1 night | Oct 11 |
| Lewis Lake site #20 | 25 ft | None | 1 | 1 night | Oct 11 |
| Lewis Lake site #25 | 20 ft | None | 1 | 1 night | Oct 5 |
| Lewis Lake site #3 | 17 ft | None | 1 | 1 night | Sep 22 |
| Lewis Lake site #34 | 23 ft | None | 1 | 1 night | Oct 3 |
| Lewis Lake site #4 | 17 ft | None | 1 | 1 night | Oct 11 |
| Lewis Lake site #49 | 19 ft | None | 1 | 1 night | Sep 28 |
| Lewis Lake site #52 | 25 ft | None | 1 | 1 night | Sep 30 |
| Lewis Lake site #53 | 22 ft | None | 1 | 1 night | Sep 29 |
| Lewis Lake site #56 | 17 ft | None | 1 | 1 night | Sep 20 |
| Lewis Lake site #59 | 16 ft | None | 1 | 1 night | Sep 30 |
| Lewis Lake site #62 | 25 ft | None | 1 | 1 night | Sep 30 |
| Lewis Lake site #63 | 20 ft | None | 1 | 1 night | Sep 30 |
| Lewis Lake site #65 | 24 ft | None | 1 | 1 night | Sep 30 |
| Lewis Lake site #67 | 25 ft | None | 1 | 1 night | Sep 30 |
| Lewis Lake site #76 | 16 ft | None | 1 | 1 night | Sep 30 |
| Lewis Lake site #80 | 16 ft | None | 1 | 1 night | Sep 21 |
| Lewis Lake site #82 | 25 ft | None | 1 | 1 night | Sep 30 |
About Lewis Lake Campground
Overview
Lewis Lake Campground—elevation 7,800 ft (2377 m)—is about twelve miles (19 km) from the South Entrance and a short walk from the southeast shore of Lewis Lake. The maximum total vehicle length in the campground is 25 feet (7.5 m) . Water is only available from July 1st-October 1st. A boat ramp is located near the campground information and registration area. Canoes, kayaks, and motor boats are allowed on Lewis Lake. The park requires a boat permit and park staff will perform an aquatic invasive species inspection. Learn more on the park's Boat on a Lake web page.
Facilities
Lewis Lake Campground offers:
84 Campsites
Food Storage Lockers
Trash/Recycling Collection
Staff or Volunteer Host On Site - Seasonal
Potable Water spigots (July 1st-October 1st)
Vault Toilets - year round
Boat launch
The campground does NOT have Cell Phone Reception or Showers
Natural Features
The campground is on one of the large, fresh water, high elevation lakes in Yellowstone. Lewis Lake allows use of both motorized and non-motorized boats.
81 monitored sitesRVs up to 25 ftNo hookupsPets OKFire pitsMax party 6
Getting there
Lewis Lake Campground is twelve miles (19.3 km) north of the South Entrance. It is located on the road between South entrance and West Thumb.
Yellowstone National Park, Yellowstone, WY 82190307-344-2107
BackpackingBirdingBoatingCanoeingFishingHikingRanger Station
View on Recreation.gov ↗ Get directions ↗
03 · Field Photos · roll CS-259309 · facility
Photo gallery
Roll CS-259309 · Lewis Lake Campground · Yellowstone WY12 frames · facility
FAQ
How do I get a reservation at Lewis Lake Campground?
Reservations for Lewis Lake Campground are made through Recreation.gov. 91.9% of tracked site-nights are not currently open for online reservation; 164 of 2,020 remain open. Campsite Sniper has also detected 270 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 17:19 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 Lewis Lake Campground?
Campsite Sniper detected 221 site-date openings at Lewis Lake Campground in the last 7 days, 268 over 30 days and 270 over the last 90.
Which day of the week had the most detected openings at Lewis Lake Campground?
Wednesday accounted for the largest share of the openings Campsite Sniper detected in the last 90 days: 66 of 270 (24.4%). Days reflect when Campsite Sniper first detected each opening, not when the change occurred upstream.
Can I get a multi-night stay at Lewis Lake Campground?
9 three-night openings are showing, counting only runs where the SAME site is free for all three nights. The soonest starts Sep 28 at site Lewis Lake site #57. Confirm and book on Recreation.gov.
Which sites at Lewis Lake Campground fit a 35-foot RV?
No RV-analyzable site here has a recorded maximum of 35 ft or more; the longest recorded is 25 ft.
Which month has the most availability at Lewis Lake Campground?
October 2026, with 110 open site-nights in the current snapshot of 967.
How far ahead of a stay do openings appear at Lewis Lake Campground?
Half of the openings Campsite Sniper detected appeared at least 14 days before the stay date; the middle 50% landed 6-14 days out. Campsite Sniper can monitor future changes for dates you select.
When is the next open date at Lewis Lake Campground?
As of the Sep 18, 2026 snapshot: the next open date is Sun, Sep 20 and the next open weekend starts Sat, Oct 3. Detected openings can add earlier dates at any time; a free Campsite Sniper alert catches those the moment they appear.
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