Sullivan Canyon with the dogs. It's pretty amazing, after only about 5 minutes of hiking, you are completely surrounded by nature: no houses, only hills and streams and greenery. It is a very nice hike with the dogs; a good trail with lots of shade most of the time. It is a moderate uphill one way and downhill on the way back; about 8 miles roundtrip (we didn't do the full roundtrip). It was pretty quiet, we passed a couple of mountain bikers (including one on a unicycle, which was quite impressive) and a few hikers with their dogs, but otherwise it was just us most of the time. I definitely want to make hiking a regular weekend activity; there are several trails in the area that I would like to explore.