RPI is a great spot. Their new athletic fields have a few almost perfect rails. Check them out here:
https://www.google.com/maps/place/Rensselaer+Polytechnic+Institute/@42.7342038,-73.6678742,170m/data=!3m1!1e3!4m2!3m1!1s0x89de0f9eebfa097d:0xa5592b13db1f5302
Troy in general is probably the best area around because the whole city is built on a hill.