Openings · last 7 days
0
01 · Detected Opening History · the openings record · file CS-233503
When Grant River reopens
Grant River's openings record: every site-date Campsite Sniper detected turning available, logged and time-stamped. Refreshed hourly.
Openings · last 30 days
38
Openings · last 90 days
176
Weekday pattern
Detected openings by day of week · 90dNo strong weekday pattern is evident in the openings Campsite Sniper has detected: 176 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 03:00 and 23:00 local-time hours. Those hours contained 57 of 176 detected openings (32.4%). 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 6 days before the stay date; the middle 50% land 3–15 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 |
|---|---|---|
| 03 | 19 | 10.8% |
| 15 | 12 | 6.8% |
| 44 | 10 | 5.7% |
| 05 | 9 | 5.1% |
| 02 | 8 | 4.5% |
Site 03 had the most detected openings in the last 90 days: 19. One free watch covers every site here.
02 · Availability Outlook · May 1 – May 3, 2027 · of 73 monitored sites
Of the 219 tracked site-dates (May 1 – May 3, 2027): 207 open for online reservation · 12 reserved.
Where the open windows are
5.5% of tracked site-dates are not currently open for online reservation. 207 of 219 remain open; here is where they are.
Load status
May 1 – May 3, 2027Not open online5.5%
Open site-dates207 / 219
Reserved (of online inventory)12 / 219
Weekday openings68
Weekend openings136
Of the open site-nights on mapped sites, 68 fall on weekdays and 136 on weekends (Fri–Sun). The split covers the 204 open site-nights on mapped sites; 207 site-dates are open across all monitored inventory.
Open dates by month
May 2027 – May 2027May holds the most room. 207 of 219 site-dates are still open there.
Holiday windows
Sites open per night · of 72 sites| Window | Night | Sites open | Status |
|---|---|---|---|
| Memorial Day | FRI May 28 | 0 | None open |
| SAT May 29 | 0 | None open | |
| SUN May 30 | 0 | None open | |
| MON May 31 | 0 | None open |
Memorial Day: no online availability on any tracked night.
Holiday windows — day use
Units open per date · of 1 day-use unit| Window | Date | Units open | Status |
|---|---|---|---|
| Memorial Day | FRI May 28 | 0 | None open |
| SAT May 29 | 0 | None open | |
| SUN May 30 | 0 | None open | |
| MON May 31 | 0 | None open |
Memorial Day: no online availability on any tracked date.
Best-availability sites
Most open site-nights · tracked window| Site | Open site-nights |
|---|---|
| 02 | 3 |
| 03 | 3 |
| 04 | 3 |
| 05 | 3 |
| 06 | 3 |
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 |
|---|---|
| Shelter | 3 |
This day-use unit currently has 3 reservation dates available.
Tracked window
CoverageCampsite Sniper's data for this facility starts May 1, 2027. That is about 180 days after the current snapshot was taken, so dates before May 1, 2027 are not covered by what Campsite Sniper tracks here — they are not known to be unavailable. The site-dates shown on this page describe May 1, 2027 onwards only. Check Recreation.gov for earlier dates.
Stays and site detail
204 open site-nights across 68 sites at Grant River, from the same hourly snapshot as everything above.
72 overnight sites and 1 day-use unit are represented in the current inventory. Day-use inventory is excluded from every night-based figure on this page — site-nights, longest runs, multi-night stays, holiday stays and RV fit; its reservation dates are listed separately below.
Multi-night stays. 68 2-night, 68 3-night openings where a single site is free for every night, per Campsite Sniper's current snapshot — soonest May 1, 2027 at site 02.
RV length. Longest recorded site here is 90 ft. 62 sites take 25 ft, 60 sites take 35 ft, 44 sites take 40 ft. 10 sites of 72 have no recorded maximum and are not counted.
Showing 60 of 68 sites with current availability
| Site | Max RV | Hookups | Open site-nights | Longest run | Dates |
|---|---|---|---|---|---|
| 02 | 30 ft | Yes | 3 | 3 nights | May 1, 2027, May 2, 2027, May 3, 2027 |
| 03 | 50 ft | Yes | 3 | 3 nights | May 1, 2027, May 2, 2027, May 3, 2027 |
| 04 | 40 ft | Yes | 3 | 3 nights | May 1, 2027, May 2, 2027, May 3, 2027 |
| 05 | 55 ft | Yes | 3 | 3 nights | May 1, 2027, May 2, 2027, May 3, 2027 |
| 06 | 45 ft | Yes | 3 | 3 nights | May 1, 2027, May 2, 2027, May 3, 2027 |
| 07 | 40 ft | Yes | 3 | 3 nights | May 1, 2027, May 2, 2027, May 3, 2027 |
| 08 | 40 ft | Yes | 3 | 3 nights | May 1, 2027, May 2, 2027, May 3, 2027 |
| 09 | 35 ft | Yes | 3 | 3 nights | May 1, 2027, May 2, 2027, May 3, 2027 |
| 10 | 35 ft | Yes | 3 | 3 nights | May 1, 2027, May 2, 2027, May 3, 2027 |
| 11 | 35 ft | Yes | 3 | 3 nights | May 1, 2027, May 2, 2027, May 3, 2027 |
| 12 | 35 ft | Yes | 3 | 3 nights | May 1, 2027, May 2, 2027, May 3, 2027 |
| 13 | 35 ft | Yes | 3 | 3 nights | May 1, 2027, May 2, 2027, May 3, 2027 |
| 14 | 35 ft | Yes | 3 | 3 nights | May 1, 2027, May 2, 2027, May 3, 2027 |
| 15 | 35 ft | Yes | 3 | 3 nights | May 1, 2027, May 2, 2027, May 3, 2027 |
| 16 | 40 ft | Yes | 3 | 3 nights | May 1, 2027, May 2, 2027, May 3, 2027 |
| 17 | 45 ft | Yes | 3 | 3 nights | May 1, 2027, May 2, 2027, May 3, 2027 |
| 18 | 45 ft | Yes | 3 | 3 nights | May 1, 2027, May 2, 2027, May 3, 2027 |
| 19 | 45 ft | Yes | 3 | 3 nights | May 1, 2027, May 2, 2027, May 3, 2027 |
| 20 | 45 ft | Yes | 3 | 3 nights | May 1, 2027, May 2, 2027, May 3, 2027 |
| 21 | 45 ft | Yes | 3 | 3 nights | May 1, 2027, May 2, 2027, May 3, 2027 |
| 22 | 40 ft | Yes | 3 | 3 nights | May 1, 2027, May 2, 2027, May 3, 2027 |
| 23 | 35 ft | Yes | 3 | 3 nights | May 1, 2027, May 2, 2027, May 3, 2027 |
| 24 | 35 ft | Yes | 3 | 3 nights | May 1, 2027, May 2, 2027, May 3, 2027 |
| 25 | 45 ft | Yes | 3 | 3 nights | May 1, 2027, May 2, 2027, May 3, 2027 |
| 26 | 90 ft | Yes | 3 | 3 nights | May 1, 2027, May 2, 2027, May 3, 2027 |
| 27 | 45 ft | Yes | 3 | 3 nights | May 1, 2027, May 2, 2027, May 3, 2027 |
| 29 | 55 ft | Yes | 3 | 3 nights | May 1, 2027, May 2, 2027, May 3, 2027 |
| 30 | 50 ft | Yes | 3 | 3 nights | May 1, 2027, May 2, 2027, May 3, 2027 |
| 31 | 50 ft | Yes | 3 | 3 nights | May 1, 2027, May 2, 2027, May 3, 2027 |
| 32 | 40 ft | Yes | 3 | 3 nights | May 1, 2027, May 2, 2027, May 3, 2027 |
| 33 | 45 ft | Yes | 3 | 3 nights | May 1, 2027, May 2, 2027, May 3, 2027 |
| 34 | 40 ft | Yes | 3 | 3 nights | May 1, 2027, May 2, 2027, May 3, 2027 |
| 35 | 55 ft | Yes | 3 | 3 nights | May 1, 2027, May 2, 2027, May 3, 2027 |
| 36 | 45 ft | Yes | 3 | 3 nights | May 1, 2027, May 2, 2027, May 3, 2027 |
| 37 | 45 ft | Yes | 3 | 3 nights | May 1, 2027, May 2, 2027, May 3, 2027 |
| 38 | 50 ft | Yes | 3 | 3 nights | May 1, 2027, May 2, 2027, May 3, 2027 |
| 39 | 45 ft | Yes | 3 | 3 nights | May 1, 2027, May 2, 2027, May 3, 2027 |
| 40 | 40 ft | Yes | 3 | 3 nights | May 1, 2027, May 2, 2027, May 3, 2027 |
| 41 | 55 ft | Yes | 3 | 3 nights | May 1, 2027, May 2, 2027, May 3, 2027 |
| 42 | 55 ft | Yes | 3 | 3 nights | May 1, 2027, May 2, 2027, May 3, 2027 |
| 43 | 45 ft | Yes | 3 | 3 nights | May 1, 2027, May 2, 2027, May 3, 2027 |
| 44 | 35 ft | Yes | 3 | 3 nights | May 1, 2027, May 2, 2027, May 3, 2027 |
| 45 | 35 ft | Yes | 3 | 3 nights | May 1, 2027, May 2, 2027, May 3, 2027 |
| 46 | 35 ft | Yes | 3 | 3 nights | May 1, 2027, May 2, 2027, May 3, 2027 |
| 47 | 40 ft | Yes | 3 | 3 nights | May 1, 2027, May 2, 2027, May 3, 2027 |
| 48 | 45 ft | Yes | 3 | 3 nights | May 1, 2027, May 2, 2027, May 3, 2027 |
| 49 | 40 ft | Yes | 3 | 3 nights | May 1, 2027, May 2, 2027, May 3, 2027 |
| 50 | 45 ft | Yes | 3 | 3 nights | May 1, 2027, May 2, 2027, May 3, 2027 |
| 51 | 35 ft | Yes | 3 | 3 nights | May 1, 2027, May 2, 2027, May 3, 2027 |
| 52 | 30 ft | Yes | 3 | 3 nights | May 1, 2027, May 2, 2027, May 3, 2027 |
| 53 | 40 ft | Yes | 3 | 3 nights | May 1, 2027, May 2, 2027, May 3, 2027 |
| 54 | 45 ft | Yes | 3 | 3 nights | May 1, 2027, May 2, 2027, May 3, 2027 |
| 55 | 40 ft | Yes | 3 | 3 nights | May 1, 2027, May 2, 2027, May 3, 2027 |
| 56 | 45 ft | Yes | 3 | 3 nights | May 1, 2027, May 2, 2027, May 3, 2027 |
| 57 | 45 ft | Yes | 3 | 3 nights | May 1, 2027, May 2, 2027, May 3, 2027 |
| 58 | 40 ft | Yes | 3 | 3 nights | May 1, 2027, May 2, 2027, May 3, 2027 |
| 60 | 35 ft | Yes | 3 | 3 nights | May 1, 2027, May 2, 2027, May 3, 2027 |
| 63 | 35 ft | Yes | 3 | 3 nights | May 1, 2027, May 2, 2027, May 3, 2027 |
| 64 | Not recorded | None | 3 | 3 nights | May 1, 2027, May 2, 2027, May 3, 2027 |
| 65 | Not recorded | None | 3 | 3 nights | May 1, 2027, May 2, 2027, May 3, 2027 |
Day-use inventory
3 available reservation dates across 1 day-use unit. Day-use inventory is reserved by the date, so it carries no stay length.
All 1 day-use unit with current availability
| Unit | Open reservation dates | Consecutive dates | Dates |
|---|---|---|---|
| Shelter | 3 | 3 dates | May 1, 2027, May 2, 2027, May 3, 2027 |
About Grant River
Overview
Spread along the banks of the Upper Mississippi River, the Grant River Campground, located in the "Catfish Capital of Wisconsin," is a modern campground that offers a plethora of outdoor and recreational activities.
Recreation
The famous fishing on the Mississippi River draws crowds of anglers each year. The most popular species is the channel catfish, earning the city of Potosi the nickname "Catfish Capital of Wisconsin." Other species include bluegill, walleye, crappie, northern pike and bass. Best to try your luck in the spring before the rice field grows up.
There is boat ramp access within the campground, but can be chalenging for larger vessels as water levels drop and aquatic vegetation grows up.
Facilities
Picnic shelter and a playgrounds create an ideal environment for a small party or family get-together. Both tent and RV sites are available, and amenities like showers, drinking water and flush toilets offer a comfortable camping experience.
Natural Features
Surrounding the large campsite is a lush river landscape with towering bluffs and beautiful sunsets, creating a nature experience for visitors without losing the comforts of modern camping.
Nearby Attractions
Potosi Brewing Company Restauraunt & Museum (Potosi, WI - 2 miles)
Lock and Dam 11 (Dubuque, IA - 19 miles)
National Mississippi River Museum & Aquarium (Dubuque, IA - 20 miles)
Diamond Jo Casino & The Q Casino (Dubuque, IA - 20 miles)
Historic sites, Antiques, Fine Dining (Galena, IL - 28 miles)
73 monitored sitesRVs up to 90 ft62 with hookups65 shadedPets OKFire pitsMax party 6
Getting there
From WI-133, Turn East on River Lane (two miles south of Potosi) and follow the directional signs approximately two miles to the campground. From US-61/WI-35, Turn S on River Lane and follow directional signs to campground.
Grant River Recreation Area, Potosi, WI 53820RANGER OFFICE - 563-582-0881 / CAMPGROUND ENTRANCE STATION - 608-763-2140
BirdingCampingDay Use AreaEvening ProgramsFishingPicnickingWater Access
View on Recreation.gov ↗ Get directions ↗
03 · Field Photos · roll CS-233503 · facility + sites
Photo gallery
Roll CS-233503 · Grant River · Potosi WI12 frames · facility + sites
FAQ
How do I get a reservation at Grant River?
Reservations for Grant River are made through Recreation.gov. The current snapshot shows substantial availability: 207 of 219 tracked site-dates are open (94.5%), though availability can change. Campsite Sniper has also detected 176 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 Nov 2, 2026 18:20 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 Grant River?
Campsite Sniper detected 176 site-date openings here over the last 90 days, none in the last 7. A free alert watches around the clock and pings you the moment one appears.
Can I get a multi-night stay at Grant River?
68 three-night openings are showing, counting only runs where the SAME site is free for all three nights. The soonest starts May 1, 2027 at site 02. Confirm and book on Recreation.gov.
Which sites at Grant River fit a 35-foot RV?
60 of the 72 sites that support RV analysis have a recorded maximum of 35 ft or more; the longest recorded is 90 ft. 62 of those 72 sites have a recorded maximum length and 10 do not; they are not counted as fitting.
Which month has the most availability at Grant River?
May 2027, with 207 open site-dates in the current snapshot of 219.
How far ahead of a stay do openings appear at Grant River?
Half of the openings Campsite Sniper detected appeared at least 6 days before the stay date; the middle 50% landed 3-15 days out. Campsite Sniper can monitor future changes for dates you select.
When is the next open date at Grant River?
Campsite Sniper cannot answer that from the current snapshot. The availability data held for Grant River begins May 1, 2027 — about 180 days after this snapshot was taken, so any earlier dates are outside what Campsite Sniper is tracking here rather than known to be unavailable. Check Recreation.gov for dates before May 1, 2027.
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