[3] As of 2017, the society owns more than 180 properties covering 54,000 acres (22,000 ha), including Rocks Estate[4] and Bretzfelder Memorial Park.
In addition to holding easements, SPNHF acts as a resource for landowners and other, smaller conservation land trusts.
[7] Members of the public, town conservation commissions and land trusts attend seminars presenting information ranging from tax laws and conservation easement creation to fundraising techniques and marketing a land trust.
From its inception, it has produced occasional publications for guidance and information, such as A New Hampshire Everlasting and Unfallen (1969)[8] and At What Cost?
[9] In contrast with other environmental groups that seek the preservation of the environment through advocating government management and regulation, the SPNHF seeks to assist and incentivize private landowners in preserving New Hampshire forest land for future posterity.