It’s never a bad time to explore the awe-inspiring landscape of Lassen Volcanic National Park in Northern California. However, if you’re interested in witnessing the sight of millions of butterflies swarming the park’s most famous peak, we suggest planning a trip for late summer! Every year, a massive butterfly migration occurs in which the top of Lassen Peak becomes covered in clouds of California Tortoiseshell Butterflies. Sounds amazing, right? Read on to learn all about why this unique natural phenomenon takes place.

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Have you visited Lassen Peak during butterfly migration before? Tell us about your favorite butterfly spotting destinations in the comments below!

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