Cool Campground Mapper — Contiguous United States

Starting Cool Campground MapperLoading the shared hosted application… Estimated time remaining: calculating…

FILTERS

Refine the map

WEATHER FILTER

Find cooler campgrounds

≤ 80°F

Temperature source

NOAA is the startup default. Only the selected source is accessed. NBM or PRISM data is not requested until that source is explicitly selected.

NOAA forecast date

Maximum forecast high

°F

States

Nothing is selected at startup. Selecting a state loads only that state’s campground records, followed by data from the temperature source currently selected above. NOAA, NBM, and PRISM are never preloaded together. Deselecting a state removes its rows from the browser but keeps the local cache for later.

Loading supported states… Estimated time remaining: calculating…

2 detail number of detailed agency/reservation sources baseline USGS all-owner locations only

Ownership Federal State Tribal Regional, county, and municipal Private Unknown ownership Data quality Show locations with no NOAA value

Automatic: weather values load after you select a state, source, or date. Ownership, quality, search, vehicle, unknown-value, and temperature-threshold filters are applied immediately in this browser without starting another weather request.

MAP & RESULTS

Search name, park, or agency Show NOAA colored maximum-temperature layer Weather-layer opacity

CAMPGROUND DATA CACHE

Campground data

No state selected. Select one to load its campground and weather data.

Campgrounds 0%

Select a state to begin.

NOAA native-grid point temperatures 0%

Weather loads after a state is selected.

Weather troubleshooting

Normally no action is needed. Use this only to retry after an error or deliberately recheck the upstream source and rebuild its point samples.

Recheck the upstream source and rebuild cached point values

Campground cache options

Campground data loads automatically when a state is first selected. Use these controls only to retry a failed source or deliberately refresh cached provider data.

Ignore recent provider caches and recheck live sources

Each detailed source, USGS baseline, and federal state slice has an independent cache. The first federal-state load may download Recreation.gov’s national ZIP once; later states reuse it.

Provider health

Provider status appears after campground data loads.

Optional private/local data settings

ACTIVE/ReserveAmerica can add private and public campgrounds only when its campsite API returns a numeric maximum equipment length. It requires your own API key.

ACTIVE campground API key Clear and disable the saved ACTIVE API key States to enrich Maximum campgrounds checked per refresh

Checking optional API status… Estimated time remaining: calculating…

For any source not covered automatically, edit data\import\additional_campgrounds.csv. The header-only template under reference is safe to copy unchanged and imports zero campgrounds.

Data notes and marker legend

Marker outline: color represents ownership (federal, state, tribal, local, private, or unknown). A dashed/paler outline indicates a USGS location-only baseline record.

Temperature colors: campground marker fills, the native-grid NOAA WebGL layer, and projection-aware fallback/NBM/PRISM raster tiles use the same continuous Fahrenheit palette and nearest-cell sampling. In NOAA mode, each point, native-grid response, and fallback tile carries the same cached NDFD GRIB2 date revision.

The temperature threshold is applied to numeric point values, not by estimating temperature from the background color.

Ownership coverage: federal, tribal, state, regional, county, municipal, private, and unknown-owner campgrounds are all included by default. Detailed direct sources cover selected state systems plus county/regional inventories. The optional ACTIVE integration and custom CSV can add private/local records with vehicle-length evidence.

Vehicle-length filter: enter 33 to keep campgrounds whose resolved representative for the selected vehicle category is at least 33 feet. That representative may have site, site-type, or park/facility confidence; park/facility evidence means at least one documented option may fit, not that every site does. The separate site-evidence quality filter is stricter and accepts only site or site-type confidence. USGS baseline records have no RV-size fields, so they remain unknown and are excluded unless you explicitly include unknown sizes. An explicit “no limit” statement is retained as categorical provenance but does not prove numeric fit; “not specified” and “not published” also remain unknown.

Federal values are campsite-level where available. Detailed sources may provide exact-site, reservation unit-type, or park-level limits. A campground-level maximum means at least one imported site/type supports that length—not every site. Always verify the exact site, loop, access road, and operator’s length definition.

NOAA mode uses the official NDFD maximum-temperature forecast and deterministically selects the nearest cell of its native CONUS grid without interpolation. NBM P90 mode shows the warm-side 90th-percentile daily high: requiring P90 ≤80°F is a nominal roughly 90% NBM probability that the actual high stays at or below 80°F. PRISM mode uses the 1991–2020 daily normal maximum on the fixed 800 m grid. Campground popups separately show USGS 3DEP bare-earth ground elevation when available. All temperature sources are gridded estimates; local shade, exposure, and elevation within a grid cell can differ, and the displayed elevation does not adjust a temperature.

Keep selected states available offline

Waiting for matching markers

Marker outline = ownership

Federal

State

Tribal

Local / regional

Private

Pale/dashed = location-only

Temperature colors (°F)

One continuous scale for campground markers and the weather overlay; layer opacity blends its colors with the base map.

MATCHING CAMPGROUNDS

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Sort

High	Max RV	Campground	State	Ownership / source	Park / agency
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