Coppertone and I had been to this park before, but we're in the midst of the 2019 Sonoma County Trails Challenge (2 down, 3 to go) and wanted to knock off another easy trail prior to meeting some friends later in the day. We chose the easier Spring Lake Loop given our time constraints.
The weather was almost a little chilly due to the thick cloud cover, but a brisk walk kept things pleasant. The water park area said it was open but the temperature at that point in the day was still a bit too cold to encourage many patrons.
Don't expect to get any solitude, particularly along the heavily used Spring Lake Loop. Some of the non-paved paths farther from the lake provide a small taste of solitude.