Every named river in the Adirondack Park — the Hudson, the Moose, the Raquette, the Sacandaga, and the rivers that drain the High Peaks.
Grassy Brook cuts through the Speculator backcountry with the kind of low profile that keeps it off most fishing reports and trail logs — no stocking records, no obvious trailhead signage, no lean-to within shouting distance. It's the sort of tributary stream that shows up on DEC wetland maps and old USGS quads but rarely makes it into conversation unless you're piecing together a bushwhack route or tracing watershed boundaries for a longer paddle. The name suggests marshy headwaters or alder-choked meanders — classic Adirondack brook trout habitat if the gradient's right and the beaver dams haven't drowned it out. Worth a look if you're already in the area with a topo map and an afternoon to kill.