Spring Lake Regional Park in Santa Rosa is a great park and has camping, hiking, biking, boat rentals and more! Located a little over an hour from most North/East Bay cities, this is a great destination for a day trip and also a family getaway.
The quiet campground is wooded and most sites are shaded, flush toilets available, coin heated showers (cold showers are free). No hookups. There are a couple of cabins available and offer three mattresses, no bedding. The cabins have all of the features of a campsite including fire pit, picnic table, and have a bonus of a deck to sit out and look at the scenery!
The 3 acre swimming lagoon is closed for distancing precautions, but when open, it is a great spot for a day trip or for campers to cool off. There are several picnic areas.
Spring Lake is pretty good size (72 acres) and has a mostly paved 2.5 mile path all the way around. Other trails surrounding the lake are moderately steep but good for a short hike or mountain biking.
Rent a boat or paddle board to explore the lake. No swimming in the main lake but the wildlife is plentiful and there are blackberries to pick when in season.
We visited Spring Lake Campground for three days with a toddler and he enjoyed biking, hiking and exploring. It was hot (90-95F) and the cold showers were perfect considering the heat. We brought a small kiddie pool for him to cool off in since the swimming lagoon was closed. The campground was about 25% full and it appeared that they were not taking reservations for all of the sites in order to keep the crowds down, which we appreciated.