Seward Mountain stands within the watershed of the Raquette River, which drains into the Saint Lawrence River in Canada, and into the Gulf of Saint Lawrence.
The southeast slopes of Seward Mtn. drain into Seward Brook, thence into the Cold River, a tributary of the Raquette River.
The west end of Seward Mtn. drains into Calkins Brook, thence into the Raquette River.
The northern slopes of Seward drain into Ward Brook, thence into Ampersand Lake, Ampersand Brook, Stony Creek, and the Raquette River.
^Russell M. L. Carson records that Professor A. Guyot and Ernest Sandoz ascended either Seward Mountain or Seymour Mountain earlier in 1870, but it is not clear which.[5]
^Terrie, Phillip G., Contested Terrain; A New History of Nature and People in the Adirondacks, Syracuse: Adirondack Museum/Syracuse University Press, 1997. ISBN978-0-8156-0904-9.
^"PRISM Climate Group, Oregon State University". PRISM Climate Group, Oregon State University. Retrieved October 26, 2023. To find the table data on the PRISM website, start by clicking Coordinates (under Location); copy Latitude and Longitude figures from top of table; click Zoom to location; click Precipitation, Minimum temp, Mean temp, Maximum temp; click 30-year normals, 1991-2020; click 800m; click Retrieve Time Series button.
