In celebration of National Park Week, which begins Saturday, all national parks in the US system are free both this weekend (April 15 and 16) and next weekend (April 22 and 23). For those interested in heading to Yosemite, that means saving a $30 entrance fee for all vehicles — but it also means that Muir Woods is free, and so is Lassen Volcanic National Park north of Chico in Northern California, as ABC 7 reports.

Though Yosemite is likely to be packed as a result, this is a perfect time to see the park's magnificent waterfalls flowing at peak capacity, with the snowmelt having gotten underway after this epic winter, and after four or five years during which some of the falls were down to a trickle.

Park Ranger Scott Gediman tells the station, "The waterfalls are great, and they are just starting to get great."

For proof, just look to Instagram. Here's Vernal Falls just today:

The best views should never be easy to reach #yosemite #vernalfalls #westcoastbestcoast

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And here's Bridalveil Fall:

Nature = [Awesomeness] #yosemite

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Here's ABC 7's coverage:

Previously: Major Winter Rain And Snow Make For Pretty Waterfalls In Yosemite National Park