I have been fortunate to see some of the great wonders that Northern California has to offer. I've seen Yosemite. I've visited sequoia trees in the snow. And my latest trip was to Muir Woods, home to one of the last old growth Redwood forests.
Muir Woods is about 30 minutes to the west of San Francisco. It is a national park that costs a whole $5 for adults and nothing for kids 15 and under. Muir Woods is a very family-friendly park that has almost a dozen walking and hiking trails for those who want to take in the wonder of the majestic coastal Redwoods. They are very abundant and can grow up to 300 feet tall. I'll spare you the details about Redwood trees, but there are some wonderful facts about them that you probably couldn't fully appreciate until you are in their presence. Just ask one of the tour guides or go to a ranger's class that is offered a few times a day there.
Hiking is fairly easy in Muir Woods. I would recommend taking the basic hiking supplies and keep an eye on the little ones because the main path does narrow a bit. The beauty about Redwood trees is that they don't provide a lot of food for bugs; therefore you don't see them or many of nature's little critters. There are some deer and tree slugs, but Muir Woods is relatively pest free.
When you get done hiking be sure to stop at the gift shop/café. You can actually buy your own little Red Wood tree! Overall I enjoyed my Muir Woods visit and look forward to doing it again.