Five New Hampshire state parks are offering free admission for hikers on New Year's Day.

Guided hikes will be available at all five parks on Jan. 1. All 50 states open some parks for free as part of the America's State Parks First Day Hikes initiative.

The five open parks are Monadnock State Park in Jaffrey, Silver Lake State Park in Hollis, Weeks State Park in Lancaster, Wellington State Park in Alexandria, and Wentworth-Coolidge Mansion State Historic Site in Portsmouth. The guided hikes will range from 1 to 3.2 miles.

Hikers can register to participate online at http://www.nhstateparks.org/news-and-events/first-day-hike.aspx .