Recreation

At the head of the valley in Yosemite National Park, as if on a pedestal, stands Half Dome, the most colossal and recognizable rock monument in the Sierra Nevada, smoothly rounded on three sides and a sheer vertical face on th
We generally emphasize the following four points:
Please visit the USGS recreation site: your science gateway for safe and vital enjoyment of the outdoors.Learn more:
The USGS publishes approximately 57,000 different topographic maps covering the United States.