Raster: Your raw elevation data could be from files in many formats, or even in a different data model--vector. Think of a TIN (triangulated irregular network) surface. But often they are called DEMs (Digital elevation models) and are in a raster formats. This surface looks like it has a color ramp applied to it--changing from green to white/light gray with elevation. Then off this you have contours (lines of constant elevation) generated and also a hillshade (this is the part that makes it look 3D by making shadows on the surface as if cast by the sun).
Vector: You have polygon data (most likely) for your park boundaries, lakes, etc. Polylines for your roads, streams, and paths. And lastly, Points for your camp sites, picnic tables, etc.
I would look for the elevation data on you state government's web pages and then I would look at the USGS data.
For the vector: I would look at the state's data and maybe the park's. Often organizations have some sort of GIS data portal or clearinghouse. New York is a big state they are sure to have something.
Okay, hope that gets you started.