Four-Mile Trail Satellite View

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Distance:  4.7 miles (7.5 km) one way; 9.4 miles (15 km) round trip
Yosemite Valley Elevation:  4,000 feet (1,200 meters)
Glacier Point Elevation:  7,200 feet (2,200 meters)
Total Elevation Change:  3,200 feet (975 meters)

Squiggly Lines Key: The green line is the 4-Mile Trail. The trailhead at its left endpoint is in Yosemite Valley near the Swinging Bridge (which is marked by the blue balloon just above the trailhead), and the right endpoint is at Glacier Point, right next to the Glacier Point gift shop, which you can see if you zoom in. In between you get to climb (or descend, depending on which way you're going) 3,200 feet (975 meters).

The purple line is the Pohono Trail, which goes from Glacier Point all the way to the Tunnel View, passing by Sentinel Dome, Taft, Dewey, Stanford, Crocker, and Inspiration Points along the way.

The red line at bottom center is the Sentinel Dome trail, which you can just see the tail of here as it terminates at, logically enough, Sentinel Dome. The red line at bottom right is the Panorama Trail, which goes from Glacier Point to the valley floor via the Mist Trail. The blue line is the Glacier Point Road.