Bear Brook State Park is a 10,000-acre (4,000 ha) preserve in Allenstown, New Hampshire, and neighboring towns.

[5] Amenities at Bear Brook include camp sites, a picnic area, over 40 miles (64 km) of hiking trails, swimming and fishing ponds, archery range, camp store, a ball field, playground, bathhouse, shelters, picnic tables, canoe and rowboat rentals, and a physical fitness course.

The park is home to the New Hampshire Snowmobile Museum, Old Allenstown Meeting House, and the Richard Diehl Civilian Conservation Corps (CCC) Museum, which are in historic buildings built by the Civilian Conservation Corps.

[6] In 1985 and 2000, the remains of a total of four female bodies, one adult and three children, were found in the park.

In January 2017, a suspect in the case was identified as Terry Peder Rasmussen (also known by several aliases)[7][8] who had died in prison in 2010.