First off, ignore the WA-7 closed ahead signs when you get to Eatonville. Don't take the detour. The entrance to Pack Forest is right before the road closed sign.
We didn't actually hike the Hugo Peak trail, but we hiked several other trails in the forest. We parked just before the gate on 1000 road, then hiked up the road a little way to an unmarked trail on the right. We followed this trai/road in a little way and found the intersection with the Wildlife trail which we followed to the Resevoir Trail. We saw some of what I think were Cougar tracks along the trail, my pictures came out horrible or I would post them here. Something to keep in mind.
The Resevoir Trail is great, a little steep in places and some blowdowns, but a really pretty hike. There are also some interpretive signs along the way that really help you "see" what you are looking at.
At the top of the Resevoir Trail (near Kirkland Pass) we took the one mile hike along the Trail of The Giants. There are some amazing trees here that are hundreds of years old, parts of the trail has you actually walking on huge fallen trees.
We then hiked back along the road back towards Kirkland Pass, where we took the "Advanced" Horse trail. This is a very steep, rocky trail. There are also some serious mud holes along the trail too. I don't know anything at all about horses, but I couldn't imagine a horse going down this hill on such a narrow trail.
Near the end of the horse trail there is some serious mud and muck, which is mixed with lots of horse poop. My husband in boots made in through okay, but I was wearing Five Fingers. Let's just say, they went into the wash as soon as we got home.
Sound a little confusing? Yeah, get a free map when you first enter the Forest, you could be in there for days if you don't.