The best replacement for trails is contrails.

The best alternatives to trails are rated as following:
★★★★★  contrails
★★★  chemtrails
★★★  tracks
★★  mad river
★★  roads
★  haunted houses
★  paths
★  chem trails
★  lakes of river trails
★  con trails
★  vapor trails
  com trails
  coast to coast
  sw motech
  koa

Your alternative for trails is not listed? Suggest!
Speaking about trails, one probably shouldn't forget about rails.

Other search terms related to trails and their ratings are:
★★★★★ rails
You have in mind a companion for trails and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of trails in all years. Click on graph for more.
trails
contrails
chemtrails