The following groups are working to develop and maintain New Hampshire’s rail trails:
- Bike-Walk Alliance of New Hampshire: http://www.bwanh.org
- *Cross New Hampshire Adventure Trail: http://www.crossnewhampshire.org
- Derry Rail Trail Alliance: http://www.derryrailtrail.org/
- East Coast Greenway: http://www.Greenway.org/
- * Fort Hill Recreational Rail Trail: https://www.town.hinsdale.nh.us/
- Friends of the Goffstown Rail Trail: http://www.goffstownrailtrail.org/
- !!! Friends of the Northern Rail Trail in Grafton County LINK DOESN”T WORK: http://www.northernrailtrail.org/
- Friends of the Northern Rail Trail in Merrimack County: http://www.FNRT.org
- *Friends of the Presidential Rail Trail: https://friendsofthepresidentialrailtrail.org
- *Friends of the Salem Bike Ped-Corridor: https://fsbpc.org
- *Granite State Rail Trail: https://www.gsrtnh.org
- Hooksett Kiwanis: http://www.hooksettkiwanis.org/
- *Londonderry Trailways https://londonderrytrails.org/about-the-rail-trail/
- *Mascoma River Greeway: https://mascomagreenway.com
- Manchester Moves: http://manchestermoves.org/
- Merrimack River Greenway Trail: http://www.mrgt.org/
- Milford Conservation Commission: http://conservation.milfordnh.info/
- National Parks Service Rivers and Trails Program: http://www.nps.gov/ncrc/programs/rtca/
- New Hampshire Bureau of Trails: https://www.nhstateparks.org/about-us/trails-bureau
- New Hampshire Department of Transportation: http://www.nh.gov/dot/
- ??? Ordway Park Committee: http://www.hampsteadnh.us/Pages/HampsteadNH_BComm/Ordway/index
- *Pathways for Keene: https://pathwaysforkeene.org
- Rockingham Planning Commission: http://www.rpc-nh.org/
- Salem Conservation Commission: http://www.salemnhconservation.org/
- Southern New Hampshire Planning Commission: http://www.snhpc.org
- Town of Swanzey: http://www.town.swanzey.nh.us/
- Windham Rail Trail Alliance: http://www.windhamrailtrail.org/
- WOW Trail: http://www.WOWTrail.com