Packed Outhouse, Sunny/Cliffside, Sonot Connector. Be advised bottom of Alpine ski area is an active construction site.
Word from the Groomers reports on Birch Hill Recreation Area, which is groomed by the NSCF (with help from your donations). Other Interior trails are groomed specifically for skiing or for multiple uses.
Find out more here:
To donate to the Birch Hill Trail Fund: