The Muir Lodge will be on your left as you drive towards Yosemite on Highway 140. There's a large sign on the highway; you shouldn't have any problem spotting it. It's near the north end of Midpines, just before the highway begins a steep descent to the Merced River Canyon. It's just under eight and a half miles (13 km) from Mariposa and 23 miles (37 km) from the Arch Rock Yosemite entrance.