You reminded me of a similar circumstance many years ago with the dam of my
current mare. Kate and I were on a trail we'd never seen when our hostess
realized she was lost. Kate never seemed to lose track of where she last
saw her trailer, so we let her take the lead. She didn't back track, but
chose a new trail bringing us, to a 30 foot sheer drop wall, but my hostess
recognized where we were and took over, finding a somewhat civilized trail home.
A few years later, when we moved to our present home (about 40 miles from
Biltmore where we'd boarded the horses for several years), Kate found an
unlatched gate (the neighbor's kid later confessed she had visited that day)
and escaped with my husband's gelding.
Fortunately a horse savy gentleman (the police couldn't figure out what to
do, though they knew where the horses belonged -- we think the kid next door
called the police) stopped to lead the horses back home, and kindly left a
note on the windshield of my truck with his number. I called and learned
that the horses had been found on the local state highway, the mare in the
lead (normally she obediently followed the gelding) working her way along
the double yellow line, headed toward the Interstate that would take her
back to Biltmore!!!