Check out this big trail in Nebraska

http://www.railstotrails.org/newsandpubs/trailofthemonth/index.html

Length: 161 miles

Counties: Antelope, Brown, Holt, Madison, Rock

Start Point/ End Point: Norfolk to Ainsworth (143 miles), and Arabia Ranch Road to Valentine (18 miles)

Surface type: Crushed stone

Uses: Walking, jogging, bicycling, inline skating and cross-country skiing; horses are allowed alongside the trail and on bridges.