Featured hike: Tolay Lake's big sky

December weather makes our skies extra big and beautiful. And for a big view of big sky — not to mention big landscapes, and the big waters of the San Pablo Bay — you can’t do better than Tolay Lake Regional Park southeast of Petaluma. This park’s unique seasonal lake, marshlands, grasslands and ridges give unobstructed views for miles, so it’s exceptionally good for bird-watching and vista-gazing.