Lets be realistic... This is a trail in the middle of an urban area. This is not a secluded nature tail in the mountains. So given its urban location, this is one of the best trails to take to get outside and enjoy fresh air and exercise. Double thumbs up. Except there are no potties at the SeaTac entrance. That's a bummer.
If you start down by the water, the hike is a good moderate uphill trek. Only downfall for me was the water treatment plant around mile 1. Kinda smelly and gross while you're trying to breathe and legitimately exercise. Other than that, it's a decent paved trail with a lot of people.