Plot basically the same as that of the film Shoot to Kill (1988), which was released the previous year.
When the Park Ranger asks to see the men's identity cards, most of them hold them up with their fingers covering up the photos on the cards. In order to not give away the escapee to the audience, even the the good guys do the same thing.
While this appears to be set in Oregon, because of the license plate and that the Cascades go through Oregon, the Mt. Cascade and Porter Mountain trail is in New York. It is a 5.6 mile trail, out and back, and takes about 4 hours. It is a popular trail and hikers are likely to meet other hikers on the trail.
The episode is set in Oregon because the state's name is shown on a car's rear license-plate.