This map shows the mainside trail network, with historical range fans superimposed. People spending any time on the trails are advised to remain on the cleared pathways and not step off-trail. This is the best way to avoid any unexploded ordnance that may be in the area. - This map shows the mainside trail network, with historical range fans superimposed. People spending any time on the trails are advised to remain on the cleared pathways and not step off-trail. This is the best way to avoid any unexploded ordnance that may be in the area.