Answer:

trails

Answer	Crossword Clue
TRAILS	Roy Rogers' "Happy ..."
TRAILS	Backpacker's byways
TRAILS	Is following

TRAILS	Park ways
TRAILS	Hiking paths
TRAILS	Some forest map lines
TRAILS	Falls behind
TRAILS	Ways through the woods
TRAILS	Lags behind
TRAILS	Gets behind
TRAILS	Hiker's paths

TRAILS	Park features
TRAILS	Skiing sites
TRAILS	Nature walks
TRAILS	Isn't first
TRAILS	Park pathways
TRAILS	Falls (off)
TRAILS	Meteor wakes.
TRAILS	Shadows.

TRAILS	Wilderness ways.
TRAILS	Straggles.
TRAILS	Pioneers' routes.
TRAILS	Forms a wake behind.
TRAILS	Follows after.
TRAILS	Grows along the ground, as arbutus.
TRAILS	Mountain paths.
TRAILS	Blazed paths.

TRAILS	Paths.
TRAILS	Cowboy routes.
TRAILS	Santa Fe and others.
TRAILS	Forest paths
TRAILS	Ho Chi Minh et al.
TRAILS	Hikers' areas
TRAILS	Tamiami and Oregon
TRAILS	Hikers' ways

TRAILS	Cherokee and Chisholm
TRAILS	Oregon and Santa Fe
TRAILS	Follows
TRAILS	Paths
TRAILS	"Happy ....."