The following info about Horseback Trails in Michigan was taken from the "Michigan Natural Resources" magazine, August 1997 issue. pg. 38
be aware that part of the 810 area code has been switched to 248 area code - this may or may not affect some of the following phone numbers
C = camping areas for equestrians
T = trails
S = nearby stables for rental horses
Brighton Recreational Area
Howell, (810) 229-6566
(C,T,S)
Fort Custer Recreation Area
Augusta (616) 731-4200
(T)
Highland Recreation Area
Milford (810) 685-2433
(C,T,S)
Ionia Recreation Area
Ionia (616) 527-3750
(T,C)
Maybury State Park
Northville (810) 349-8390
(T,S)
Ortonville Recreation Area
Ortonville (810) 627-3828
(C,T)
Pinckney Recreation Area
Pinckney (313) 426-4913
(T,S)
Pontiac Lake Recreation Area
Waterford (810) 666-1020
(C,T,S)
Proud Lake Recreation Area
Milford (810) 685-2433
(T)
Waterloo Recreation Area
Chelsea (313) 475-8307
(C,T,S)
Yankee Springs Recreation Area
Middleville (616) 795-9081
(C,T)
Mackinac Island State Park
Mackinac Island (616) 436-5563
(S - buggy rental as well as riding horse rental)
Also contact
Michigan Trail Riders Association (810) 889-3624
about the 250 mile Shore to Shore ride from Oscoda to Empire