One Isle Royale map. Every layer keeps its source.

Search trails, campgrounds, visitor places and water routes first, then step into lighthouses, shipwrecks, boating zones, vegetation, geology and historical maps without confusing old reference cartography with current visitor information.

NPS / federal sources first Keyless map Fail-soft layers Source catalog

Isle Royale is one island, but not one kind of trip.

First visit

Orient Rock Harbor and Windigo, then see how trails, camps, docks and visitor facilities relate before picking an itinerary.

Backpacking

Start with the trail/camp network. Use the current NPS mileage table and camping rules for the distances and restrictions that actually govern the trip.

Boating & paddling

Turn on the 22 official NPS Quiet/No-Wake polygons to see regulated water beside docks and routes, then verify the current NPS boating and anchorage rules before operating.

Deep exploration

Start with the lightweight six-class vegetation overview or USGS shaded relief, then step into detailed vegetation, geologic units, 1996–2017 vegetation change and the 2021 Horne Fire with every source date visible.

Source strategy

The map keeps discovery, geometry and authority separate.

NPMaps = completeness checklist

The NPMaps Isle Royale collection is useful because it exposes the breadth of available map products. It is not treated as the authoritative feature database.

View NPMaps Isle Royale collection

NPS = current visitor authority

The current NPS Maps & Brochures hub remains the handoff for park guides, boating maps, off-trail camping and trail mileage.

Open current NPS map resources

Federal GIS = deep layers

Geology and vegetation use actual federal GIS rather than traced brochure pixels. Relief comes from the keyless USGS The National Map shaded-relief service, while older science layers keep their original vintage visible.

Vegetation GIS · Geology GIS

Machine-readable source desk

Every major map family has a destination.

“Live” means the browser can currently request vector features. “ETL-ready” means the source is resolved to real GIS but belongs in the normalized tile pipeline before it should be turned on as a large web layer. The complete machine-readable manifest is also available as raw source catalog JSON.

Layer family	Status	Publisher / source	Why it is handled this way
Current visitor map geometry	live	National Park Service / ArcGIS Online	Primary runtime source is the public visitor web map when readable. If it fails, the tool can fall back to a public 2021 Isle Royale FeatureServer with POIs, trails, and park boundary before using approximate local anchors. Current closures, regulations, transportation, and campground status always hand off to current NPS pages.
Visitor map fallback item	fallback	National Park Service / ArcGIS Online	Secondary public web map item. If both web-map items fail, a public 2021 FeatureServer is tried before any approximate local anchors.
Regional access and transportation map	cataloged	National Park Service	Use as a planning/reference source; operational transportation information must be verified against current NPS and operators.
Rock Harbor area guide	cataloged	National Park Service	Direct NPS Rock Harbor Area Guide (2015). Use for facility/orientation context; current operational status still comes from current NPS pages.
Windigo area guide	cataloged	National Park Service	Direct NPS Windigo Area Guide (2015). Use for facility/orientation context; current operational status still comes from current NPS pages.
Off-trail camping zones	current-status-plus-reference	National Park Service	Isle Royale uses 46 off-trail camping zones on the permit map. Current closure zone numbers are parsed from the NPS Current Conditions feed and surfaced as operational status without inventing polygon geometry; verify the current permit map and conditions before departure.
Ferry, seaplane and water access	runtime-plus-reference	National Park Service	Public web-map routes may render at runtime; current schedules remain external operational data.
Shipwrecks and dive sites	cataloged	National Park Service	Publish only public visitor-facing wreck locations. Never expose sensitive resource fields by default.
Relief / terrain reference	cataloged	National Park Service / USGS	Prefer a licensed/self-hosted terrain source over scraping presentation artwork.
Isle Royale lighthouses	runtime-plus-reference	National Park Service	Four lighthouse locations; current access restrictions must come from current NPS information.
Geology	generated-runtime	National Park Service Geologic Resources Inventory	NPS GRI digital release 2021; older source mapping. Generated from the NPS GRI GeoPackage: 1,975 geologic-unit features, reprojected and simplified for web use. Manifest records SHA-256 and source accuracy caveat; not survey-grade.
Vegetation baseline (2000)	generated-runtime	National Park Service	2000 inventory; imagery primarily 1994/1996. Historical baseline only. The 19,072 source polygons are dissolved into 38 TNC_DESCRI vegetation classes and simplified for opt-in web display. Do not interpret as current forest condition.
Vegetation inventory — simplified	derive-from-detailed	Derived from NPS vegetation inventory	Generate from detailed classes when possible instead of digitizing the simplified artwork.
Quiet / no-wake zones	gis-download-known	National Park Service	NPS provides a GIS-data download from the current quiet/no-wake page. Treat as regulation-sensitive.
Anchorage zones	cataloged	National Park Service	Direct NPS Anchorage Zones map (2018), retained as an official boating-planning reference. Verify current restrictions and conditions before acting.
Archived brochure map	reference-only	National Park Service; discovered via NPMaps	Historical/reference layer only. Never present old route or regulation information as current.
Historic Windigo Nature Trail map	reference-only	National Park Service; discovered via NPMaps	Date-stamp and keep disabled by default if later georeferenced.
Boat-in campground facilities	live-api	National Park Service	page updated June 23, 2026. Fetched through the same-origin Isle Royale API and matched to mapped campgrounds by normalized public place name. Includes dock depth, shelters, tent sites, food lockers, stay limit, fire/grill and generator fields when NPS supplies them.
Current Isle Royale conditions and closures	live-api	National Park Service	Fetched through the same-origin Isle Royale API. The tool detects only closure patterns it knows how to parse and never treats a no-match result as proof that the park has no alerts.