Images

In this image, the south side of El Capitan may be seen as fog clears around it. El Capitan is a granite monolith that rises about 3,000 ft (900 m) from the valley floor and is one of Yosemite National Park's most famous landmarks.

In this image, the Moon may be seen rising over Half Dome. Half Dome is a granite dome, rising about 4,737 ft (1,444 m) above the surrounding valley. It is part of the Sierra Nevada batholith and is one of Yosemite National Park's most famous features.

In this image, Lower Cathedral Rock can be seen shrouded in fog in Yosemite National Park. It is composed of granite and is part of the Sierra Nevada batholith.

In this image, sunset may be seen on Moran Point in Yosemite Valley within Yosemite National Park.

In this image, Lower Yosemite Falls may be seen. Lower Yosemite Falls is the lowest of the three sectiosn of Yosemite Falls. It is about 320 ft (98 m) high. Yosemite Falls is one of the most famous waterfalls within Yosemite National Park.

In this image, Cathedral Spires can be seen shrouded in fog from Tunnel View in Yosemite National Park. From left to right, the peaks are known as Lower Cathedral Rock, Middle Cathedral Rock, and Higher Cathedral Rock. They are composed of granite and are part of the Sierra Nevada batholith. Like the rest of Yosemite Valley, they were carved by glaciers.

In this image, Inspiration Point may be seen shrouded in fog. Inspiration Point lies just outside the entrance to Yosemite Valley within Yosemite National Park.

In this image, the Leaning Tower formation may be seen from Yosemite Valley Floor within Yosemite National Park.

In this image, Bridalveil Fall can be seen from its base in Yosemite National Park. The waterfall is 617 ft (188 m) in height and is one of the most well-known of Yosemite National Park's waterfalls.

In this image, Bridalveil Creek is seen flowing just beneath the base of Bridalveil Fall. The waterfall is 617 ft (188 m) in height and is one of the most well-known of Yosemite National Park's waterfalls.

In this image, Upper Yosemite Falls may be seen. Upper Yosemite Falls is the highest of the three sectiosn of Yosemite Falls. It is about 1,430 ft (440 m) high. Yosemite Falls is one of the most famous waterfalls within Yosemite National Park.

In this image, Yosemite Valley may be seen shrouded in fog from Tunnel View. Yosemite Valley is a glacially carved valley located within Yosemite National Park. It is part of the Sierra Nevada batholith and is largely composed of granite.

In this image, the Moon may be seen in detail rising over Half Dome. Half Dome is a granite dome, rising about 4,737 ft (1,444 m) above the surrounding valley. It is part of the Sierra Nevada batholith and is one of Yosemite National Park's most famous features.

In this image, Grizzly Peak may be seen in detail from Yosemite Valley Floor within Yosemite National Park.

USGS biologist Terry Maret holds a channel catfish samples as part of a mercury monitoring program conducted by the USGS and the City of Boise.

In this image, the west side of El Capitan may be seen shrouded in fog from Tunnel View. El Capitan is a granite monolith that rises about 3,000 ft (900 m) from the valley floor and is one of Yosemite National Park's most famous landmarks.

In this image, Bridalveil Fall can be seen shrouded in fog from Tunnel View in Yosemite National Park. The waterfall is 617 ft (188 m) in height and is one of the most well-known of Yosemite National Park's waterfalls.

In this image, Bridalveil Fall can be seen in detail from Tunnel View in Yosemite National Park. The waterfall is 617 ft (188 m) in height and is one of the most well-known of Yosemite National Park's waterfalls.

In this image, all three sections of Yosemite Falls can be seen. Yosemite Falls is the highest measured waterfall in North America at 2,425 ft (739 m) in height. Yosemite Falls is one of the most famous waterfalls within Yosemite National Park.

In this image, the entrance to Yosemite Valley may be seen shrouded in fog. Yosemite Valley is a glacially carved valley located within Yosemite National Park. It is part of the Sierra Nevada batholith and is largely composed of granite.

In this image, Half Dome may be seen from the base of Cathedral Spires. Half Dome is a granite dome, rising about 4,737 ft (1,444 m) above the surrounding valley. It is part of the Sierra Nevada batholith and is one of Yosemite National Park's most famous features.