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U.S. Forest Service · The Castles National Natural Landmark · SD

Reva Gap Campground

First come, first servedNo reservation, and none to be had: the sites go to whoever pulls in first.

This is how it should work.

Get directions
Right now
Nobody has saidNo season, no closure, no bookings to read
Drawn from the record · 3,250 ft · 0% tree cover · water within reach · Bortle 2 sky
3,250 ftElevation
3,233 ftWater · an unnamed pond
41.3 miSW of Hettinger, ND
0%Tree cover
Bortle 2Night sky · darkest of 52 in SD

The place

the agency’s own description · what’s there

In the agency’s own words

A campground with 8 sites located in the Slim Buttes Unit near the Castles National Natural Landmark, one of two on the Sioux Ranger District. The campground is within commuting distance to Buffalo, SD. Camp sites: 8 Accessible Facilities: Toilet Trash Pickup: No Firewood: No No Reservations: This campground does not use a reservation system, it is managed on a first-come, first-served basis. There is a 14 day stay limit. Information: Sioux District Office Box 37, Main & First Camp Crook, SD 57724 (605) 797-4432

Source: Recreation.gov data (RIDB), full extract · Aug 23, 2026

Facilities

Firewood
Mentioned
Source: Stated in the agency description · Aug 23, 2026

Around the campground

Hiking
Picnicking
Source: Recreation.gov activity records · Aug 23, 2026
Official page: Reva Gap Campground →

Nothing to book, just show up

One of 1,623 federal campgrounds where the site still goes to whoever pulls in first. Get there before noon on a summer weekend.

recreation.gov publishes no availability for a campground you can’t reserve, so there’s no thirty-night reading to draw here. The season bar above is what the agency does publish.

BookingNo reservationsNothing to book, and no release date to wait forthe agency’s record
Runs itU.S. Forest Servicethe agency’s record
Directions
Every line of the receipt · 3

What you actually pay

The sign priceU.S. Forest Service
The U.S. Forest Service publishes no per-night rate for this campground that we can read, so there’s no sign price to print. That’s a gap in the record, not a free campground.
The booking feerecreation.gov
Nothing. This campground takes no bookings, so there’s no reservation fee to pay.
What a stay costs
The agency publishes no nightly rate for this campground, so there’s no total to show.
How we know this receipt · 4
Booking fee, change fee, cancellation fee, no-show: Rules and Reservation Policies, Recreation.gov, the published fee schedule, curated by hand into lib/reservation-fee-schedule.json (9 rows, each carrying its own verbatim sentence). The publisher states these policies were last updated September 2019. · Sep 9, 2026
The two totals: Derived by CAMPANAC by adding the agency’s own published nightly rate to recreation.gov’s own published reservation fee. Both components are cited above; the addition is ours and is shown only where every component is known. · Sep 9, 2026
Who keeps the booking fee: Recreation.gov facility policy text, Dead Swede Campground (facility 234221) · Not on the national policy page. This is agency policy text recreation.gov publishes on individual campground pages; this site holds it verbatim on 45 active campgrounds (campground_rules.cancellation_description, scripts/load-facility-rules.mjs). · Sep 9, 2026
The contract: Reservation Gods: Who Stole Our Campsites and Sold Them Back to Us, More Than Just Parks, April 2025 · Apr 1, 2025
Source: Recreation.gov data (RIDB), full extract · Aug 23, 2026

rules read Sep 7, 2026 · record Aug 23, 2026 · How we know all this

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Getting there

the map and the coordinate
Coordinate45.52639, -103.17194
The agency’s pageOfficial page ↗

Where it is

Source: Recreation.gov data (RIDB), full extract · Aug 23, 2026

The weather

the next four days · the thirty-year normal

Next four days, and the thirty-year normal

Forecast

This Afternoon74°Sunny
Tonight46°Partly Cloudy
Sunday63°Sunny
Sunday Night39°Partly Cloudy

NWS forecast for Prairie City, SD

Source: National Weather Service, UNR forecast office · Oct 17, 2026

Typical weather

Typical October night 30°F, day 58°F.

Coldest month of the year: typical January night 7°F, below freezing. Bring a bag rated colder than that, and expect ice in the water bottle.

90°32°0°

Daily high and lowDays with 0.10 in or more

A normal is the 1991-2020 average for the month, not a forecast: about half of all Julys are colder than the July line. The seven-day forecast above answers the other question.

Measured at: BUFFALO 13 ESE, SD (USW00094081), 6 miles away and 367 ft lower
Source: NOAA National Centers for Environmental Information, U.S. Climate Normals 1991-2020, monthly normals · Sep 8, 2026

The land, and who answers for it

who answers for it

Who answers for this land

Dusty Johnson, official portrait

Reva Gap Campground is in South Dakota’s at-large congressional district. Its representative, Dusty Johnson (R), votes on the laws that decide what happens to this land. Public-lands grade so far: F. See every public-lands vote →

Seen something wrong here? Tell us.

Source: U.S. Census district boundaries and the MTJP Congressional Public Lands Score

How we know

every fact on this page, and where it came from
Right now: U.S. Forest Service publishes no season and no closure for this campground, and it takes no bookings we can read. That’s a gap in the record and not a locked gate.
Elevation: USGS 3DEP elevation point query at this campground’s coordinate · Sep 7, 2026
Night sky: VIIRS Day/Night Band annual cloud-free composite, VNL V2 2024 (Earth Observation Group, Colorado School of Mines), read at the published coordinate: 0.018 mcd/m² of artificial all-sky glow, ranked against the 52 rated federal campgrounds in South Dakota · Sep 8, 2026
Sky-glow model: Duriscoe, Anderson, Luginbuhl and Baugh (2018), a simplified model of all-sky artificial sky glow derived from VIIRS Day/Night band data, the National Park Service sky-glow model
Cell signal: the Forest Service’s own campground description, read as text by CAMPANAC. None of this is a measurement. It’s what the land manager published about the place, and phones, carriers and weather all disagree with each other; treat it as a warning, not a promise.
Nearest place of any size: Prairie City, SD, 16.7 mi W (a census designated place). Straight line.
Nearest town: U.S. Census Bureau TIGER/Line 2024 places, measured by CAMPANAC to the town boundary; population is the ACS 2020-2024 5-year estimate · Sep 9, 2026