When staying in Vacaville one weekend I was looking for a place to do a long run. I was very happy that I found Lagoon Valley Park. Lots of trails, many hills (if you want them) including a long one up to the cell tower, a trail around the lagoon, and a number of drinking fountains. If you are a runner and staying in the Vacaville area, I could not recommend this park any more highly! Also good for hiking and mountain biking, plus they have a frisbee golf course.
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