Florida Horse http://flahorse.com/
Horse & Mule http://www.horseandmuletrails.com/
Horsemen of America http://www.backcountryhorse.com/
New England trails http://www.equinesite.com/trails.htm
Janine Wilder www.horsetravels.com
Horse Motels www. horsemotel.com
US Roadside Assistance for Equestrians 1-800-844-1409 www.usrider.org
Endurance Net site www.endurance.net/travelnet/ - Travel Net gives a list(abc by state & town) of places to stay overnight looks like most are just private horse owners who are willing to let folks stop overnight.
Natalie's Barn & Breackfast site, www.natbarn.com she gives a list of Horse Vacation Stopover locations and a list of Trails.
Horse Trip www.horsetrip.com featuring state-by-state listings of stables and B&B's that will board your horse after a long day on the road.
Midwest Stable Directory www.stablesdirectory.org this is
a midwest listing of stables also has a short list of vets & hospitals in WI, IL, & IN
Tips & Trails
Equestrian Trail Rider http://www.qtm.net/~mitchj/index.html
Trail directory www.horsetraildirectory.com