We ran into this herd of horses in the middle of nowhere and were told when we reached the fishing lodge that they were wild horses.

Here's some info on "The Wild Horses of the Chilcotin"

In British Columbia the Chilcotin holds the last major numbers of wild
horses in the Canadian North west. There have been wild horses in the
Chilcotin District for 200 years, we have no reason to think they have
not been in the Brittany Triangle for just as long. Friends of the
Nemaiah Valley and the Xeni Gwet'in First Nations Government propose the
creation of a Chilcotin Wild horse Preserve encompassing the Brittany
Triangle as a core area including the entire Aboriginal Wilderness
Preserve. Giving these horses a place to call home is important to their
survival, they have become a part of the biodiversity and the ecosystem
here in Canada.

Brittany Triangle

The Brittany Triangle itself is approximately 155,000 hectares, a
visually stunning ecosystem comprising high elevation lodgepole pine
forest extensively dotted with small lakes, streams and associated
riparian areas with spruce and aspen groves. It is rich in wildlife
including grizzly and black bears, cougar, wolves, wolverine, coyotes,
fisher and marten. Ungulates like moose and mule deer abound. Extensive
wetland areas, increased in size by beaver activity, provide rich
habitat for an incredible array of bird life. And of course there are
the horses!

Wild horses in western Canada
are found primarily in forested areas, typically lodgepole pine
woodlands interspersed with pockets of dry grassland, shrub-land and
sedge meadows, where they feed on a variety of grasses and sedges
throughout the year. Most herds consist of 5-10 animals, although smaller and larger groups
also occur. Horses are non-territorial, and home ranges of several herds
may overlap.

Although populations may increase under favorable conditions, high
mortality rates due to starvation and increased susceptibility to
predation by cougars and wolves during severe winters are probably
limiting factors.

Since these horses arrived before European contact in the region, their
origin was most likely from the Spanish stock which provided mounts for
the plains Indians over 400 years ago. This was the most likely source
of horses at that time. It is documented that some of the Spanish horses
had filtered up into the Kootenay District well over 200 years ago.
Given there have been wild horses in the Chilcotin District for 200
years, we have no reason to think they have not been in the Brittany
Triangle just as long. Genetic dilution has occurred with the arrival of
ranching in the latter part of the nineteenth century, when domestic
stock began to augment existing wild bands.