Railbike Tours, Inc.  
   Fun, safe and authorized railbike tours. Railbike scenic Ohop Valley and Lake Kapowsin near Eatonville, Washington Enjoy a truly unique experience.
   http://www.railbike.com/

Rons Riders  
   Manufacturers of railbikes, railriders and railroad wheels, advocacy for railbikes for the disabled and blind.
   http://www.railriders.net/

Bentley Railbike  
   A rallying point for railbike enthusiasts, with information, pictures, stories, plans, and links.
   http://rrbike.freeservers.com/

Railbike International  
   An association of railbike enthusiasts organized to promote safe and legal railbiking on abandoned rails. Provides newsletter, Railbike International Messenger (RIM), publications and maps.
   http://members.aol.com/RAILBIKES/

Air Line Rail Trail  
   Located in eastern Connecticut and built in 1869 to 1874, the trail stretches more than 50 miles from near the Connecticut River to the Massachusetts border. News, history, maps and general information provided.
   http://pages.cthome.net/mbartel/ARRhome.htm