There is now a $10 per day fee to anchor out which is a drop in the bucket considering what it cost to anchor at other places. But if your just visiting the beach by land it's free.
Usually to use the grill and pic nic area is first come first serve. Everytime we had an event more than 3 times a year we never really called and didnt have a problem at all. But yes lagoon is free for all!
As far as i know its free to go to the lagoon. If you want to use the grills and host a party, then yes you'll have to contact the city of san mateo parks and rec and ask them how much it is.
Yes lagoon are free and young children and grandchildren and teenager also great grandparents and great great grandparents
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