The Miller State Park is a state park in Peterborough, New Hampshire. It is best known for being the oldest state park in all of New Hampshire.

Located at the summit and flank of Pack Monandnock, the Miller State Park provides an excellent nature experience for visitors. During most of the year, folks can drive up to the summit through its 1.3 mile paved road to access the excellent vistas at the top of the hill. Hikers can also enjoy the trek up the summit with three trails available in the site. Aside from these, visitors can also enjoy several winter recreation activities inside the park.

The Miller State Park is open on a schedule, so make sure to contact the site before heading out. They are commonly open during the weekends of the fall and spring seasons and full time on the summer months.