Parking is about a tenth of a mile before the trailhead, but I forgot to get parking coords.
The North Fork Twenty-File Mile Creek Trail appropriately enough follows the North Fork of Twenty-Five Mile Creek. This cache is about a mile and a quarter in. The hike is almost entirely flat except for a little up and down close to the cache.
There are a few small but pretty waterfalls just before the cache location, and in general as you get close to the creek it feels like a Western Washington hike with lots of water-loving plants (including tons of thimbleberries, many of which we consumed while hiding the cache).
We kept hiking, and the trail is washed out about a mile beyond the cache site. We went around the washout (high on the way in, streambed on the way back, both are challenging). After that, the trail looks like it gets little traffic and almost no maintainence. We couldn't find the junction with the Lone Peak Trail that's marked on the map.
Coords were a little jumpy, so don't be afraid to use the hint/spoiler picture.
Update on the trail: We went to the Lone Peak Trail and hiked down, and the reason we couldn't find the junction was that it's about a quarter of a mile farther than is marked on the map. After the junction, the North Fork trail gets better and goes on for at least a few more miles (where we turned around). So, if you push on past the bad area it turns into quite a nice hike