Alger Island Campground
New York State DEC · New York · 17 sites
Imagery: USGS The National Map
Overview
Alger Island Campground is a campground run by the New York State Department of Environmental Conservation, with 17 sites. Very shady: nearly every site is under trees. Verizon reports coverage at every site; T-Mobile and AT&T report none.
17 of 17 sites shaded
0 of 17 sites in full sun
1 of 17 sites with clear sky
Map of the campground
Every site from NYSDEC’s own campsite map. Choose a layer to see it across the campground; tap a site to open it in Roam.
Layers
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Questions
Which sites at Alger Island Campground are the shadiest?
Nearly all of them. All 17 sites at Alger Island Campground have good shade from the trees, including from the hot afternoon sun.
See the tree canopy in RoamWhich sites at Alger Island Campground get the most sun?
None are truly sunny; the sunniest still have trees over most of the site.
See the tree canopy in RoamWill Starlink work at Alger Island Campground?
Only at a few. About 1 of 17 sites have a clear gap in the trees for Starlink; most sit under tall trees. Satellite texting on a phone needs less open sky, but still works best from the most open spot you can find. This is our estimate from tree heights — check with the Starlink app's obstruction check when you arrive.
See the tree canopy in RoamWhich sites at Alger Island Campground are the most level?
3 of 17 sites are flat; 14 are steeper, better for tents.
See the slope at each site in RoamDoes Alger Island Campground have cell service?
Mostly. Verizon reports coverage at every site; T-Mobile and AT&T report none. That's the coverage each carrier reports to the FCC, not a measured signal, so under trees or below a ridge it can be weaker.
See the coverage map in RoamWhen is the best time to see fall color at Alger Island Campground?
October. In a typical year the leaves around Alger Island Campground are at their best in early to mid October, though any one fall can run a week or two early or late. Much of the forest here stays green, so expect color in patches. Roam’s fall foliage map shows how far the color has come this week, free every September through November.
See this week’s fall color in RoamWhat’s the weather like at Alger Island Campground in October?
In October, expect highs around 55°F and lows around 34°F, with about 4.9 inches of rain over the month and 2 inches of snow. Every month’s averages are in Roam Premium.
Open Alger Island in RoamCampground facts
- Sites
- 17
- Elevation
- 1,708–1,736 ft
- Managed by
- New York State Department of Environmental Conservation
- Booking
- Reserve with New York State
How we know Sources and limits
Shade, sun and Starlink are our estimates from Meta and the World Resources Institute’s canopy-height model (about 2 m pixels, from satellite imagery calibrated with space lidar; CC BY 4.0). From 2 m above each site we trace 72 lines out to 60 m and note the tallest tree in each direction. Shade counts trees overhead, the canopy within 30 m and how much of the afternoon sky is blocked. Sun counts how open the southern sky is. Starlink needs open sky above 35°, with the northern half counted twice because US dishes tilt north, and we keep the best spot within 8 m of the site’s post. The model sees tree heights only, not trunks, buildings or hills, so check with the Starlink app when you arrive.
Slope is the ground at each site’s post over about 4 m, from USGS 3DEP 1 m lidar: level under 2%, gentle to 4% (most rigs level on blocks), sloped to 8% (fine for a tent), steep beyond.
Cell coverage is from the FCC Broadband Data Collection (carrier filings as downloaded May 2026): each site is tested against each carrier’s modelled outdoor 4G/5G coverage. It is what the carriers report, not a measured signal.
Fall color is the typical peak from NASA’s MODIS satellite record of when leaves change (2001–2023), limited to deciduous and mixed forest with USGS land cover (NLCD), calibrated to the USA National Phenology Network’s ground reports of colored leaves (CC BY 4.0). It is an average of many autumns, so the page gives a window, not a date.
Weather is NOAA’s 1991–2020 climate normals for the campground. Sites — where each one is, its number and its type — are from the agency’s own campsite GIS feed: the DEC’s points-of-interest map on Open NY (data.ny.gov) (as of August 2026). Map imagery: USGS The National Map.
Page data as of October 15, 2026. Full source notes are in each layer’s info in the app.