The Salmon Creek #4365 has a north and south side which, with a tiny bit of road walking, can be combined, making a 8.25 mile loop that has 1,800 ft.  elevation gain. For a shorter out and back hike you can do the Salmon Creek Trail North Bank to Salmon Creek Falls. The first few hundred feet from the parking area to the Salmon Creek Trail is nothing spectacular. You are walking right next to a railway line and there is spray paint on the wall, as well as trash in the bushes. But once you come up to the main trail, you can take a small trail to the right and go look at the impressive railroad bridge over the river. It does make for some neat photos.