The Whitehorse Trail is in generally good condition, with a lot of fall leaves on the ground, and possibly some wet or muddy areas. The surface varies quite a bit. Near the Oso Slide Memorial, there's a nice wide paved path, which lasts for a short distance before changing to an unpaved path that has narrowed to a single file trail in places. Still, all of it if easy and level, and shouldn't pose any difficulties. We'll start at the slide memorial, allowing a half-hour or so to tour the excellent and moving displays and artworks. Then we'll head east on the trail toward Darrington. You won't walk all the way to Darrington (that's ~11 miles), but you can go roughly 3, 5, or 6 miles, your option. The van will move ahead to various check-in points at those mileage intervals. Stop when you feel you've gone far enough.