picture above is of a different creek in Boulder. I live really near this trail, so I walk it fairly often - there are a couple of pretty parts, and the creek access is nice in summer, but a lot of the path runs next to a fairly loud road, which isn't great. they recently fixed the bridge, so you don't have to walk along the shoulder anymore. not the best trail in/around Boulder, but that's a really high bar! I like South Boulder Creek for a longer afternoon walk in the spring/summer/early fall.
Not a bad trail. I went to the trail on a September afternoon. I accidentally wandered off on to the South Boulder Creek Trail for a few miles before realizing I didn't take the turn to the west for the Bobolink Trail. Ended up doing about 7 miles by the time I returned. It was a pleasant walk. Semi-near 36, so you get some car noise, but nice enough without having to go too far out of town. LOTS of dogs when I went and portions of the trail are leash-free areas where the dogs will roam free.