"trails" - key terms from Wikipedia

blood trails
bridle trails
canyon emigrant trails	national conservation
condensation trails
dead trails
dusty trails
emigrant trails	national conservation area
equestrian trails
frontier trails
happy trails
hidden trails
hiking trails
hiking trails	in new
hotspot trails
ionization trails
jet trails
live trails
many trails
monkey trails
national old trails
national old trails	road
national trails	system
polonium trails
prepared trails
rock canyon emigrant trails	national
side trails
ski trails
smoke trails
some trails
stairway trails
state trails
trails
trails	and roads
trails	are designated
trails	include
trails	riders
trekking trails
vapor trails
vapour trails	or contrails