Henrys Lake Wilderness Study Area
Managed by BLM
1 acres
Dog rules not recorded
No trailhead mapped yet
Johnny Sack Cabin · Photo: Pilleyk · CC BY-SA 3.0–Not graded
Outdoors in Island Park
Few parks or trails are on the map in Island Park
47% of Island Park’s land is conserved, about 1,822 acres. 5.8 miles of mapped trail cross Island Park, 1.0 per square mile of land.
Conserved land
47%
1,822 acres · of 6.1 sq mi of land
Trails
5.8 mi
1.0 per sq mi of land
Near a park
under 1%
of residents within ½ mile
The map
Conserved land, trails & bike routes
Tap a number to zoom to a park. Tap a layer to hide it.
Easements protect land from building but are usually private.© OpenStreetMap contributors · USGS PAD-US
Places to walk
Pick a walk
Directions go to the nearest trailhead or public parking.
Who protects it
1,822 conserved acres
47% of Island Park’s land. Who manages Island Park’s conserved land, from the USGS Protected Areas Database. Approximate, because parcels can overlap.
U.S. Forest Service1,432 ac
State Department of Land331 ac
Land trusts & nonprofits83 ac
State fish & wildlife4 ac
National Forest · 1,432 acState Resource Management Area · 267 acConservation Easement · 68 acUnknown Easement · 64 acPrivate Conservation · 15 ac
Good to know
Conserved doesn’t always mean open to visitors. 104 acres are conservation easements, usually private land. Public access isn’t recorded for 18 of 22 parcels. The walks above are places people visit.
The biggest protected parcels
| Parcel (PAD-US) | Managed by | Acres | Public access |
|---|---|---|---|
| Targhee National Forest National Forest | U.S. Forest Service | 1,432 | Open |
| Idaho Department of Lands State Resource Management Area | State Department of Land | 267 | Open |
| Henrys Fork Private Conservation | Land trusts & nonprofits | 15 | Unknown |
| Henrys Lake Hatchery State Other or Unknown | State fish & wildlife | 4 | Restricted |
Things to do
2 places to go in Island Park
Beaches, playgrounds, peaks, falls and more. Pick a kind.
Boat launches in Island Park
2 boat launches without a name on the map. Tap “Show all on map” to see them.
Trails & water
1 named trail
Named trails
Box Canyon Trail0.2 mi
History along the way
History →2 places on the National Register
The country’s official list of places worth saving (National Park Service).
When to get out
The best walking months in Island Park: June to September
NOAA’s 1991–2020 normals for the town and the daylight at its latitude. Outlined months have long days, highs of 59 to 86 °F and little rain for the place.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 9.2 | 10.4 | 11.8 | 13.4 | 14.8 | 15.5 | 15.2 | 14.0 | 12.4 | 10.9 | 9.5 | 8.8 |
| High (°F) | 26 | 31 | 40 | 48 | 59 | 68 | 78 | 77 | 67 | 51 | 36 | 26 |
| Rain (in) | 3.1 | 2.6 | 2.6 | 2.5 | 2.9 | 2.5 | 1.2 | 1.2 | 1.5 | 2.0 | 2.6 | 3.6 |
August is the driest month (1.2 in) and July the warmest (highs of 78 °F). 3.6 inches fall in December, the wettest month. The climate in Island Park →
Questions about parks and trails in Island Park
Are dogs allowed on Island Park’s trails?
Henrys Lake Wilderness Study Area doesn’t have dog rules recorded on the map; check the signs at the trailhead.
Is there public land near Island Park?
337,626 acres of parks and open public land lie inside Island Park or within 10 miles of it (PAD-US), 1,608 of them inside the city line.
Trail talk
Conditions, parking and favorite walks from Island Park neighbors.
Share a tip
Sources
Where this page comes from
Conserved and public land: USGS Protected Areas Database of the United States (PAD-US), service updated July 2026. Parks, trails, playgrounds, beaches and other places: OpenStreetMap (© OpenStreetMap contributors, ODbL), map data as of 2026-10-28. Land and water area: Census 2025 Gazetteer. Residents near a park: 2020 Census blocks. National Register: National Park Service. How TownRatings grades the outdoors →