I have taken the small stretch leading from the Everett mall to Martha lake. this was a trip on bikes with some friends and we had a great time. the trail gets a bit confusing being that it breaks up into regular traffic but we printed out a map so we could find the trail easier. it was mostly flat with a few hills and bridges. there was places to pull to the side and play in the grass when the kids got bored. after we reconnected with the trail near 128th st it was surrounded by tall trees with plenty of shade and small deer trails to explore.