When the tide goes out, a hidden world of marine life is revealed—full of strange and beautiful creatures clinging to rocks or tucked beneath seaweed. Tide pooling offers a rare glimpse into this world, and in this guide, I’ll take you to my favorite spots near San Francisco, with tips on when to go, what to look for, and how to explore responsibly.

What could be more breathtaking than a road trip from California’s rugged Pacific coast across Utah’s deep red deserts to Colorado’s rushing mountain rivers in late spring? Imagine yourself traversing the vast, sun-scorched deserts along the Loneliest Road in America, gazing into the universe under some of the world’s darkest skies, hiking the tallest sand dunes in the Northern Hemisphere, and admiring turquoise alpine lakes while looking down at bone-dry deserts stretching endlessly below. In this article, I’ll take you through my absolute favorite outdoor adventures on a three-week road trip spanning California’s coastline, Utah and Nevada’s wild landscapes, and Colorado’s Rocky Mountains.