The Pend Oreille County Park map, available online, is accurate. There used to be a trail south of the entrance road, apparently, but that area is now a disc golf course which is itself seriously overgrown and hard to follow.
I walked around the Big Sky loop. The trail was brushy and hard to follow at times. This being June, there were plenty of ticks that I had to brush off. I got the feeling this might make a better shoulder season hike, either before or after the brush and ticks peak. Pleasant enough otherwise.
With the day off and several inches of fresh snow on the ground, I headed out for an early morning hike. I packed my snowshoes in the car but with only 6" on the ground, I decided to leave them. The dogs and I did the Big Sky Loop for a ~4.5 mi hike. The trail is brushy in places and I was glad to be wearing Goretex pants. I forgot my raincoat and was soaked on the top but nice and dry on the bottom. It snowed the whole way and the was close to 8" on the ground by the time I was done. I saw no one on the trail. I didn't need any traction devices at the time but with freeze and thaw happening, I bet it's slippery just a few days after.
I decided to do the Big Sky Loop here one lunch after while my dogs were going crazy with energy and I need frankly needed the quick break from work. The trail is in good condition with a few trees down but nothing too hard to cross. With the growth in late summer, the trail seems a little overgrown but I noticed that some work had been done on the western portion on the trail. This trail isn't as scenic in the late summer as it is in the spring but it's a nice trail to jump on when you need a taste of the outdoors.