Openings · last 7 days
142
Booking reality
Campsite Sniper detected 142 site openings here in the last 7 days
01 · Detected Opening History · the openings record · file CS-233611
When South Marcum Campground reopens
South Marcum Campground's openings record: every site-date Campsite Sniper detected turning available, logged and time-stamped. Refreshed hourly.
Openings · last 30 days
295
Openings · last 90 days
306
Weekday pattern
Detected openings by day of week · 90dNo strong weekday pattern is evident in the openings Campsite Sniper has detected: 306 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 06:00 and 19:00 local-time hours. Those hours contained 103 of 306 detected openings (33.7%). Hours show when Campsite Sniper first detected each opening, in Central 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 10 days before the stay date; the middle 50% land 4–28.8 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 |
|---|---|---|
| 090 | 17 | 5.6% |
| 113 | 16 | 5.2% |
| 087 | 14 | 4.6% |
| 076 | 14 | 4.6% |
| 060 | 14 | 4.6% |
Site 090 had the most detected openings in the last 90 days: 17. One free watch covers every site here.
02 · Availability Outlook · Sep 18 – Nov 8, 2026 · of 160 monitored sites
Of the 8,320 tracked site-nights (Sep 18 – Nov 8, 2026): 3,241 open for online reservation · 2,897 reserved · 2,182 closed. Of the facility's 160 monitored sites, 159 can be reserved online and 1 are first-come, first-served.
Where the open windows are
61% of tracked site-nights are not currently open for online reservation. 3,241 of 8,320 remain open; here is where they are.
Load status
Sep 18 – Nov 8, 2026Not open online61%
Open site-nights3,241 / 8,320
Reserved (of online inventory)2,897 / 6,138
Weekday openings1,935
Weekend openings1,306
Of the open site-nights on mapped sites, 1,935 fall on weekdays and 1,306 on weekends (Fri–Sun).
Open dates by month
Sep 2026 – Nov 2026October holds the most room. 2,018 of 4,960 site-nights are still open there.
Holiday windows
Sites open per night · of 160 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 | |
| Thanksgiving | THU Nov 26 | 0 | None open |
| FRI Nov 27 | 0 | None open | |
| SAT Nov 28 | 0 | None open |
Labor Day: no online availability on any tracked night. Thanksgiving: no online availability on any tracked night.
Best-availability sites
Most open site-nights · tracked window| Site | Open site-nights |
|---|---|
| T-01 | 48 |
| 093 | 47 |
| 094 | 45 |
| 099 | 45 |
| 100 | 45 |
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 dateFri · Sep 18
Next open weekendFri · Sep 18
The next bookable night is Sep 18; the first open weekend starts Sep 18. Campsite Sniper can watch later dates for you.
Stays and site detail
3,241 open site-nights across 128 sites at South Marcum Campground, from the same hourly snapshot as everything above.
Multi-night stays. 354 2-night, 305 3-night, 142 7-night openings where a single site is free for every night, per Campsite Sniper's current snapshot — soonest Sep 18 at site T-04.
RV length. Longest recorded site here is 94 ft. 146 sites take 25 ft, 144 sites take 35 ft, 137 sites take 40 ft. 14 sites of 160 have no recorded maximum and are not counted.
Showing 60 of 128 sites with current availability
| Site | Max RV | Hookups | Open site-nights | Longest run | Dates |
|---|---|---|---|---|---|
| T-01 | Not recorded | None | 48 | 29 nights | Sep 18, Sep 19, Sep 20, Sep 21, Sep 22, Sep 23, Sep 24, Sep 27, Sep 28, Sep 29, Sep 30, Oct 1 +36 more |
| 093 | 77 ft | Yes | 47 | 27 nights | Sep 19, Sep 20, Sep 21, Sep 22, Sep 23, Sep 24, Sep 25, Sep 26, Sep 27, Sep 28, Sep 29, Sep 30 +35 more |
| 094 | 59 ft | Yes | 45 | 28 nights | Sep 18, Sep 19, Sep 24, Sep 25, Sep 26, Sep 27, Sep 28, Sep 29, Sep 30, Oct 1, Oct 2, Oct 3 +33 more |
| 099 | 93 ft | Yes | 45 | 29 nights | Sep 18, Sep 19, Sep 24, Sep 25, Sep 26, Sep 27, Sep 28, Sep 29, Sep 30, Oct 1, Oct 2, Oct 3 +33 more |
| 100 | 53 ft | Yes | 45 | 29 nights | Sep 18, Sep 19, Sep 24, Sep 25, Sep 26, Sep 27, Sep 28, Sep 29, Sep 30, Oct 1, Oct 2, Oct 3 +33 more |
| T-02 | Not recorded | None | 45 | 31 nights | Sep 18, Sep 19, Sep 20, Sep 21, Sep 22, Sep 23, Sep 24, Sep 27, Sep 28, Sep 29, Sep 30, Oct 1 +33 more |
| T-04 | Not recorded | None | 45 | 45 nights | Sep 18, Sep 19, Sep 20, Sep 21, Sep 22, Sep 23, Sep 24, Sep 25, Sep 26, Sep 27, Sep 28, Sep 29 +33 more |
| T-06 | Not recorded | None | 45 | 45 nights | Sep 18, Sep 19, Sep 20, Sep 21, Sep 22, Sep 23, Sep 24, Sep 25, Sep 26, Sep 27, Sep 28, Sep 29 +33 more |
| T-07 | Not recorded | None | 45 | 45 nights | Sep 18, Sep 19, Sep 20, Sep 21, Sep 22, Sep 23, Sep 24, Sep 25, Sep 26, Sep 27, Sep 28, Sep 29 +33 more |
| T-10 | Not recorded | None | 45 | 45 nights | Sep 18, Sep 19, Sep 20, Sep 21, Sep 22, Sep 23, Sep 24, Sep 25, Sep 26, Sep 27, Sep 28, Sep 29 +33 more |
| T-12 | Not recorded | None | 45 | 45 nights | Sep 18, Sep 19, Sep 20, Sep 21, Sep 22, Sep 23, Sep 24, Sep 25, Sep 26, Sep 27, Sep 28, Sep 29 +33 more |
| 136 | 63 ft | Yes | 43 | 22 nights | Sep 18, Sep 19, Sep 20, Sep 21, Sep 22, Sep 23, Sep 24, Sep 25, Sep 26, Sep 27, Sep 28, Sep 29 +31 more |
| 143 | 61 ft | Yes | 43 | 22 nights | Sep 18, Sep 19, Sep 20, Sep 21, Sep 22, Sep 23, Sep 24, Sep 25, Sep 26, Sep 27, Sep 28, Sep 29 +31 more |
| 104 | 50 ft | Yes | 42 | 21 nights | Sep 18, Sep 19, Sep 20, Sep 21, Sep 22, Sep 23, Sep 24, Sep 25, Sep 26, Sep 27, Sep 28, Sep 29 +30 more |
| 106 | 63 ft | Yes | 42 | 21 nights | Sep 18, Sep 19, Sep 20, Sep 21, Sep 22, Sep 23, Sep 24, Sep 25, Sep 26, Sep 27, Sep 28, Sep 29 +30 more |
| 140 | 69 ft | Yes | 42 | 21 nights | Sep 18, Sep 19, Sep 20, Sep 21, Sep 22, Sep 23, Sep 24, Sep 25, Sep 26, Sep 27, Sep 28, Sep 29 +30 more |
| 141 | 63 ft | Yes | 42 | 21 nights | Sep 18, Sep 19, Sep 20, Sep 21, Sep 22, Sep 23, Sep 24, Sep 25, Sep 26, Sep 27, Sep 28, Sep 29 +30 more |
| 142 | 60 ft | Yes | 42 | 21 nights | Sep 18, Sep 19, Sep 20, Sep 21, Sep 22, Sep 23, Sep 24, Sep 25, Sep 26, Sep 27, Sep 28, Sep 29 +30 more |
| 146 | 66 ft | Yes | 42 | 21 nights | Sep 18, Sep 19, Sep 20, Sep 21, Sep 22, Sep 23, Sep 24, Sep 25, Sep 26, Sep 27, Sep 28, Sep 29 +30 more |
| 001 | 75 ft | Yes | 41 | 22 nights | Sep 18, Sep 19, Sep 20, Sep 21, Sep 22, Sep 24, Sep 25, Sep 26, Sep 27, Sep 28, Sep 29, Sep 30 +29 more |
| 101 | 55 ft | Yes | 41 | 21 nights | Sep 18, Sep 19, Sep 20, Sep 21, Sep 22, Sep 23, Sep 24, Sep 25, Sep 26, Sep 27, Sep 28, Sep 29 +29 more |
| 103 | 60 ft | Yes | 41 | 21 nights | Sep 18, Sep 19, Sep 20, Sep 21, Sep 22, Sep 23, Sep 24, Sep 25, Sep 26, Sep 27, Sep 28, Sep 29 +29 more |
| 105 | 45 ft | Yes | 41 | 21 nights | Sep 18, Sep 19, Sep 20, Sep 21, Sep 22, Sep 23, Sep 24, Sep 25, Sep 26, Sep 27, Sep 28, Sep 29 +29 more |
| 135 | 69 ft | Yes | 41 | 21 nights | Sep 18, Sep 19, Sep 20, Sep 21, Sep 22, Sep 23, Sep 24, Sep 25, Sep 26, Sep 27, Sep 28, Sep 29 +29 more |
| T-05 | Not recorded | None | 41 | 22 nights | Sep 18, Sep 19, Sep 20, Sep 21, Sep 22, Sep 23, Sep 24, Sep 25, Sep 26, Sep 27, Sep 28, Sep 29 +29 more |
| T-09 | Not recorded | None | 41 | 29 nights | Sep 20, Sep 21, Sep 22, Sep 23, Sep 24, Sep 25, Sep 26, Sep 27, Sep 28, Sep 29, Sep 30, Oct 1 +29 more |
| 003 | 69 ft | Yes | 40 | 20 nights | Sep 18, Sep 19, Sep 20, Sep 21, Sep 22, Sep 23, Sep 24, Sep 25, Sep 26, Sep 27, Sep 28, Sep 29 +28 more |
| 005 | 62 ft | Yes | 40 | 18 nights | Sep 18, Sep 19, Sep 21, Sep 22, Sep 23, Sep 24, Sep 25, Sep 26, Sep 27, Sep 28, Sep 29, Sep 30 +28 more |
| 095 | 84 ft | Yes | 40 | 22 nights | Sep 18, Sep 19, Sep 24, Sep 25, Sep 26, Sep 27, Sep 28, Sep 29, Sep 30, Oct 1, Oct 2, Oct 3 +28 more |
| 097 | 76 ft | Yes | 40 | 22 nights | Sep 18, Sep 19, Sep 24, Sep 25, Sep 26, Sep 27, Sep 28, Sep 29, Sep 30, Oct 1, Oct 2, Oct 3 +28 more |
| T-11 | Not recorded | None | 40 | 36 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 +28 more |
| T-13 | Not recorded | None | 40 | 25 nights | Sep 18, Sep 19, Sep 20, Sep 21, Sep 22, Sep 23, Sep 24, Sep 27, Sep 28, Sep 29, Sep 30, Oct 1 +28 more |
| 096 | 85 ft | Yes | 39 | 22 nights | Sep 24, Sep 25, Sep 26, Sep 27, Sep 28, Sep 29, Sep 30, Oct 1, Oct 2, Oct 3, Oct 4, Oct 5 +27 more |
| 145 | 63 ft | Yes | 39 | 23 nights | Sep 18, Sep 19, Sep 20, Sep 21, Sep 22, Sep 23, Sep 24, Sep 25, Sep 26, Sep 27, Sep 28, Sep 29 +27 more |
| 147 | 68 ft | Yes | 39 | 23 nights | Sep 18, Sep 19, Sep 20, Sep 21, Sep 22, Sep 23, Sep 24, Sep 25, Sep 26, Sep 27, Sep 28, Sep 29 +27 more |
| 002 | 75 ft | Yes | 38 | 18 nights | Sep 20, Sep 21, Sep 22, Sep 23, Sep 24, Sep 25, Sep 26, Sep 27, Sep 28, Sep 29, Sep 30, Oct 1 +26 more |
| 071 | 79 ft | Yes | 38 | 20 nights | Sep 18, Sep 19, Sep 20, Sep 21, Sep 22, Sep 23, Sep 24, Sep 25, Sep 26, Sep 27, Sep 28, Sep 29 +26 more |
| 108 | 38 ft | Yes | 38 | 20 nights | Sep 20, Sep 21, Sep 22, Sep 23, Sep 24, Sep 25, Sep 26, Sep 27, Sep 28, Sep 29, Sep 30, Oct 1 +26 more |
| 113 | 69 ft | Yes | 38 | 22 nights | Sep 18, Sep 19, Sep 20, Sep 21, Sep 22, Sep 23, Sep 24, Sep 25, Sep 26, Sep 27, Sep 30, Oct 1 +26 more |
| 124 | 52 ft | Yes | 38 | 21 nights | Sep 18, Sep 19, Sep 20, Sep 21, Sep 22, Sep 23, Sep 24, Sep 25, Sep 26, Sep 27, Sep 28, Sep 29 +26 more |
| 010 | 70 ft | Yes | 37 | 13 nights | Sep 18, Sep 19, Sep 20, Sep 21, Sep 22, Sep 23, Sep 25, Sep 26, Sep 27, Sep 28, Sep 29, Sep 30 +25 more |
| 068 | 50 ft | Yes | 37 | 15 nights | Sep 23, Sep 24, Sep 25, Sep 26, Sep 27, Sep 28, Sep 29, Oct 4, Oct 5, Oct 6, Oct 7, Oct 12 +25 more |
| 130 | 65 ft | Yes | 37 | 21 nights | Sep 18, Sep 19, Sep 20, Sep 21, Sep 22, Sep 23, Sep 24, Sep 25, Sep 26, Sep 27, Sep 28, Sep 29 +25 more |
| 011 | 76 ft | Yes | 36 | 14 nights | Sep 18, Sep 19, Sep 20, Sep 21, Sep 22, Sep 23, Sep 25, Sep 26, Sep 27, Sep 28, Sep 29, Sep 30 +24 more |
| 012 | 56 ft | Yes | 36 | 22 nights | Sep 18, Sep 19, Sep 20, Sep 21, Sep 22, Sep 23, Sep 24, Sep 29, Sep 30, Oct 4, Oct 5, Oct 6 +24 more |
| 102 | 71 ft | Yes | 36 | 18 nights | Sep 21, Sep 22, Sep 23, Sep 24, Sep 25, Sep 26, Sep 27, Sep 28, Sep 29, Sep 30, Oct 1, Oct 2 +24 more |
| 004 | 71 ft | Yes | 35 | 11 nights | Sep 18, Sep 19, Sep 21, Sep 22, Sep 23, Sep 24, Sep 26, Sep 27, Sep 28, Sep 29, Sep 30, Oct 1 +23 more |
| 098 | 93 ft | Yes | 35 | 14 nights | Sep 24, Sep 25, Sep 26, Sep 27, Sep 28, Sep 29, Sep 30, Oct 1, Oct 2, Oct 3, Oct 4, Oct 5 +23 more |
| 134 | 54 ft | Yes | 35 | 19 nights | Sep 20, Sep 21, Sep 22, Sep 23, Sep 24, Sep 25, Sep 26, Sep 27, Sep 28, Sep 29, Sep 30, Oct 1 +23 more |
| 144 | 57 ft | Yes | 35 | 18 nights | Sep 18, Sep 19, Sep 20, Sep 21, Sep 22, Sep 23, Sep 24, Sep 25, Sep 26, Sep 27, Sep 28, Sep 29 +23 more |
| T-03 | Not recorded | None | 35 | 17 nights | Sep 18, Sep 19, Sep 20, Sep 21, Sep 22, Sep 23, Sep 24, Sep 28, Sep 29, Sep 30, Oct 1, Oct 2 +23 more |
| 007 | 74 ft | Yes | 34 | 12 nights | Sep 19, Sep 20, Sep 21, Sep 22, Sep 23, Sep 24, Sep 25, Sep 26, Sep 27, Sep 28, Sep 29, Sep 30 +22 more |
| 009 | 67 ft | Yes | 34 | 13 nights | Sep 18, Sep 19, Sep 20, Sep 21, Sep 22, Sep 23, Sep 24, Sep 26, Sep 27, Sep 28, Sep 29, Sep 30 +22 more |
| 091 | 40 ft | Yes | 34 | 9 nights | Sep 18, Sep 20, Sep 21, Sep 22, Sep 23, Sep 24, Sep 28, Sep 29, Sep 30, Oct 1, Oct 4, Oct 5 +22 more |
| 092 | 77 ft | Yes | 34 | 10 nights | Sep 19, Sep 20, Sep 21, Sep 22, Sep 23, Sep 24, Sep 27, Sep 28, Sep 29, Sep 30, Oct 5, Oct 6 +22 more |
| T-14 | Not recorded | None | 34 | 11 nights | Sep 18, Sep 20, Sep 21, Sep 22, Sep 23, Sep 24, Sep 25, Sep 27, Sep 28, Sep 29, Sep 30, Oct 1 +22 more |
| 008 | 70 ft | Yes | 33 | 13 nights | Sep 24, Sep 26, Sep 27, Sep 28, Sep 29, Sep 30, Oct 1, Oct 2, Oct 3, Oct 4, Oct 5, Oct 6 +21 more |
| T-08 | Not recorded | None | 33 | 15 nights | Sep 20, Sep 21, Sep 27, Sep 28, Sep 29, Sep 30, Oct 1, Oct 4, Oct 5, Oct 6, Oct 7, Oct 8 +21 more |
| 075 | 89 ft | Yes | 32 | 15 nights | Sep 20, Sep 21, Sep 22, Sep 23, Sep 24, Sep 27, Sep 28, Sep 29, Sep 30, Oct 1, Oct 4, Oct 5 +20 more |
| 076 | 66 ft | Yes | 32 | 11 nights | Sep 18, Sep 19, Sep 20, Sep 21, Sep 22, Sep 23, Sep 24, Sep 28, Sep 29, Sep 30, Oct 1, Oct 12 +20 more |
About South Marcum Campground
Overview
South Marcum Campground is located on the south-eastern shore of Rend Lake— the perfect place to enjoy a wide variety of activities, events, and nature at its best. Rend Lake is made up of 20,633 acres of water and 19,523 acres of land. Whether you're looking for high adventure, a peaceful retreat, or something in between, you'll find it here in the heart of Southern Illinois.
Recreation
South Marcum Campground is conveniently located near the South Marcum Day Use Area, which includes a boat ramp and a reservable picnic shelter. Within the campground, visitors can access the Rend Lake Bike Trail—over 20 miles of paved pathways that guide riders through scenic woodlands and across views of Rend Lake and the Big Muddy River. The area offers abundant opportunities for boating, hiking, fishing, hunting, swimming, and general outdoor exploration. Additional recreation features around Rend Lake include an archery complex with a 3D trail and elevated shooting platform, a dog park with a swimming feature, and two public swimming beaches (including the pet-friendly North Marcum Beach).
Facilities
South Marcum Campground offers 158 reservable campsites each equipped with a picnic table and a firepit. Electric hookups are provided at all sites, excluding tent sites. The campground offers a dump station, hot showers, flush toilets, and drinking water to provide a comfortable camping experience for guests. A playground is also conveniently located within the Whispering Pines camping loop near the shower house.
Natural Features
The fields, forests, and waters of Rend Lake provide a natural haven for wildlife and an outdoor wonderland for you. Woodland areas are made up of hickory, oak, and beautiful maples providing habitat to white-tail deer, turkeys, racoons, and many more native species. The shorelines are an excellent viewing area for waterfowl, shorebirds, and bank fishing the known crappie population.
160 monitored sites1 FCFS siteRVs up to 94 ft146 with hookups139 shadedPets OKFire pitsMax party 8
Getting there
From I-57 take exit 71 and turn west onto Highway 14. After 3 miles turn right on Rend City Road, then right on Rend Lake Dam Rd. Continue 3 miles to the park entrance on the left.
South Marcum Campground, Benton, IL 62812618-724-2493
BikingBirdingBoatingCampingFishingSwimmingWater Access
View on Recreation.gov ↗ Get directions ↗
03 · Field Photos · roll CS-233611 · facility + sites
Photo gallery
Roll CS-233611 · South Marcum Campground · Benton IL12 frames · facility + sites
FAQ
How do I get a reservation at South Marcum Campground?
Reservations for South Marcum Campground are made through Recreation.gov. 3,241 of 8,320 tracked site-nights are currently open (39%). Campsite Sniper has also detected 306 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 South Marcum Campground?
Campsite Sniper detected 142 site-date openings at South Marcum Campground in the last 7 days, 295 over 30 days and 306 over the last 90.
Can I get a multi-night stay at South Marcum Campground?
305 three-night openings are showing, counting only runs where the SAME site is free for all three nights. The soonest starts Sep 18 at site T-04. Confirm and book on Recreation.gov.
Which sites at South Marcum Campground fit a 35-foot RV?
144 of the 160 sites that support RV analysis have a recorded maximum of 35 ft or more; the longest recorded is 94 ft. 146 of those 160 sites have a recorded maximum length and 14 do not; they are not counted as fitting.
Which month has the most availability at South Marcum Campground?
October 2026, with 2,018 open site-nights in the current snapshot of 4,960.
How far ahead of a stay do openings appear at South Marcum Campground?
Half of the openings Campsite Sniper detected appeared at least 10 days before the stay date; the middle 50% landed 4-28.8 days out. Campsite Sniper can monitor future changes for dates you select.
When is the next open date at South Marcum Campground?
As of the Sep 18, 2026 snapshot: the next open date is Fri, Sep 18 and the next open weekend starts Fri, Sep 18. Detected openings can add earlier dates at any time; a free Campsite Sniper alert catches those the moment they appear.
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We run paced availability checks for South Marcum Campground. One watch covers every matching online-reservable site.
Get the ping
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.