The lower park trails are pretty well marked, but very flat and boring. If you're in decent shape, you have to go through the horse gate and up into the hills to appreciate this area. Once you go through the gate, the signs disappear, so you're on your own. The grades are pretty tough, partially because they're mostly loose gravel. I'd give it three stars, but the views from up in the hills are pretty amazing. Almost zero shade, so be prepared on hot days. Recommend insect spray for the biting flies in the warm months.
This hike was very hard to start and many parts of the trail were very steep with a lot of loose gravel. I'm in shape, even fit, and I was sore and tired when I was done hiking today. The trail is not marked at all, which is kind of frustrating, but I had great internet service throughout so I pulled up this app multiple times to see where I was. There are a lot of trails throughout so it's easy to switch from one to the other. The views are amazing and the hike is worth it, but it's definitely a challenge.