Khumbu icefall from Everest Base Camp, Solukhumbu District, Sagarmatha National Park, UNESCO World Heritage Site, Nepal, Himalayas, Asia

Mule train between Phakding and Namche, Everest Base Camp Trek, Solukhumbu, Nepal, Himalayas, Asia

Illuminated tents at Island Peak Base Camp, Solu Khumbu Everest Region, Sagarmatha National Park, Himalayas, Nepal, Asia

Shopping for souvenirs in Namche Bazaar, the main town during the Everest base camp trek, Nepal, Asia

Tents at Everest Base Camp, Solu Khumbu Everest Region, Sagarmatha National Park, UNESCO World Heritage Site, Nepal, Himalayas, Asia

Ice pinnacles near Everest Base Camp, Solu Khumbu Everest Region, Sagarmatha National Park, UNESCO World Heritage Site, Nepal, Himalayas, Asia

Prayer flags at Everest Base Camp, Solu Khumbu Everest Region, Sagarmatha National Park, UNESCO World Heritage Site, Nepal, Himalayas, Asia

Prayer flags at Everest Base Camp, Solu Khumbu Everest Region, Sagarmatha National Park, UNESCO World Heritage Site, Nepal, Himalayas, Asia

Tents at Everest Base Camp, Solu Khumbu Everest Region, Sagarmatha National Park, UNESCO World Heritage Site, Nepal, Himalayas, Asia

Namche Bazaar is the last town during the trek to Everest Base Camp, seen here with Kongde peak, Khumbu Region, Himalayas, Nepal, Asia

A trekker stops beside a chorten to admire the views on the way to Everest Base Camp with views of Taboche in the distance, Khumbu Region, Himalayas, Nepal, Asia

Shopping for souvenirs in Namche Bazaar, the main town during the Everest base camp trek, Khumbu Region, Nepal, Asia

Namche Bazaar is the last town during the trek to Everest Base Camp, seen here with Kongde peak, Khumbu Region, Himalayas, Nepal, Asia

A trekker on his way to Everest Base Camp with Everest the distant peak on the left and Lhotse the peak on the right, Khumbu Region, Himalayas, Nepal, Asia

A trekker spins a Buddhist prayer wheel while trekking towards to Everest Base Camp, Khumbu Region, Nepal, Asia

Climbers test their gear at Everest Base Camp before making their way onto the mountain, Khumbu Region, Himalayas, Nepal, Asia

A climber at Everest Base Camp the day after he has successfully summited Everest shows the signs of exposure at high altitude, Khumbu, Nepal, Asia

A climber at Everest Base Camp the day after he has successfully summited Everest showing signs of exposure at high altitude, Khumbu Region, Nepal, Asia

Tents at Everest Base Camp at night, Solu Khumbu Everest Region, Sagarmatha National Park, UNESCO World Heritage Site, Nepal, Himalayas, Asia

A trekker on their way to Everest Base Camp, Mount Everest is the peak to the left with some spindrift blowing from the top, Himalayas, Nepal, Asia

Kathmandu to Base Camp trek, Solu Khumbu Everest Region, Sagarmatha National Park, UNESCO World Heritage Site, Nepal, Himalayas, Asia

Shopping for souvenirs in Namche Bazaar, the main town during the Everest base camp trek, Khumbu Region, Nepal, Asia

Tents at Everest Base Camp, Solu Khumbu Everest Region, Sagarmatha National Park, UNESCO World Heritage Site, Nepal, Himalayas, Asia

Prayer flags at the Everest Base Camp sign, Solu Khumbu Everest Region, Sagarmatha National Park, Himalayas, Nepal, Asia

Island Peak base camp, Solu Khumbu Everest Region, Sagarmatha National Park, UNESCO World Heritage Site, Nepal, Himalayas, Asia

Tents at Everest Base Camp, Solu Khumbu Everest Region, Sagarmatha National Park, UNESCO World Heritage Site, Nepal, Himalayas, Asia

Climbing practice near Everest Base Camp, Khumbu Region, Himalayas, Nepal, Asia

Puja ceremony, Everest Base Camp, Solu Khumbu Everest Region, Sagarmatha National Park, UNESCO World Heritage Site, Nepal, Himalayas, Asia

Ama Dablam base camp in the Everest region glows at twilight, Himalayas, Nepal, Asia

Prayer flags and the Everest base camp at the end of the Khumbu glacier that lies at 5350m, Himalayas, Nepal, Asia

Prayer flags and the Everest base camp at the end of the Khumbu glacier that lies at 5350m, Himalayas, Nepal, Asia

Everest Base Camp at the end of the Khumbu glacier lies at 5350m, Khumbu Region, Himalayas, Nepal, Asia

A trekker in the Everest region on the way up to Everest Base Camp walking in front of Cholatse, Khumbu Region, Himalayas, Nepal, Asia

A trekker makes her way to Everest Base Camp, Khumbu Region, Himalayas, Nepal, Asia

Prayer flags at the Everest Base Camp sign, Solu Khumbu Everest Region, Sagarmatha National Park, Himalayas, Nepal, Asia

Trekkers en route to Everest Base Camp take a break, Khumbu Region, Nepal, Asia

A trekker on her way to Everest Base Camp stops to take in the views, Khumbu Region, Himalayas, Nepal, Asia

Trekkers make their way along an alternative route via Photse to Everest Base Camp, Himalayas, Nepal, Asia

A trekker in the Everest region on the way up to Everest Base Camp, a view of Pumori in the distance, Khumbu Region, Himalayas, Nepal, Asia

Puja ceremony, Everest Base Camp, Solu Khumbu Everest Region, Sagarmatha National Park, UNESCO World Heritage Site, Nepal, Himalayas, Asia

Silhouette of local boy at sunset, Everest Base Camp Trek, Nepal, Asia

A climber walks towards advanced base camp at 5800 metres on Mera Peak, 6420 metres, a popular trekking peak in the Khumbu region, with Mount Everest beyond, Nepal Himalaya, Nepal, Asia

Mount Everest Base Camp on the Tibetan side, Himalayas, Tibet, China, Asia

Hoards of trekkers make their way to Everest Base Camp, Mount Everest is the peak on the left, Khumbu Region, Nepal, Himalayas, Asia

Everest base camp hiking trail, Sagarmatha National Park, UNESCO World Heritage Site, Khumbu Valley, Nepal, Himalayas, Asia

Yak on the Everest base camp trail, Sagarmatha National Park, UNESCO World Heritage Site, Khumbu Valley, Nepal, Himalayas, Asia

Mani stones inscribed with an ancient Buddhist mantra decorate the trail to Everest Base Camp, Khumbu Region, Nepal, Himalayas, Asia

Yaks make their way down from Everest Base Camp to collect more supplies, with Kongde the peak in the distance, Nepal, Himalayas, Asia

Tents at Island Peak Base Camp, Solu Khumbu Everest Region, Sagarmatha National Park, Himalayas, Nepal, Asia

Everest Base Camp at the end of the Khumbu glacier lies at 5350m, Khumbu Region, Nepal, Himalayas, Asia

Namche Bazaar, on the way to Everest Base Camp, has grown from a traditional mountain village to a bustling trading hub, Khumbu Region, Nepal, Himalayas, Asia

Everest Base Camp, a temporary city at 5500m on the Khumbu glacier, Khumbu Region, Nepal, Himalayas, Asia

Namche Bazaar is the last town during the trek to Everest Base Camp, seen here with Kongde peak, Khumbu (Everest) Region, Nepal, Himalayas, Asia

The old village of Pangboche on the Everest Base Camp trek, Nepal, Himalayas, Asia

Everest Base Camp at the end of the Khumbu glacier lies at 5350m, Khumbu Region, Nepal, Himalayas, Asia

Namche Bazaar is the last town during the trek to Everest Base Camp, seen here with Kongde peak, Khumbu (Everest) Region, Nepal, Himalayas, Asia

Tents at Everest Base Camp set up on the glacier among the boulders and holes in the ice, Khumbu Region, Nepal, Himalayas, Asia

Everest Base Camp at the end of the Khumbu glacier lies at 5350m, Khumbu Region, Nepal, Himalayas, Asia

Ama Dablam Base Camp, Khumbu (Everest) Region, Nepal, Himalayas, Asia

A Mani wall, inscribed with an ancient Buddhist mantra decorates the trail to Everest Base Camp, Nepal, Himalayas, Asia

Namche Bazaar is the last town during the trek to Everest Base Camp, seen here with Kongde peak, Khumbu (Everest) Region, Nepal, Himalayas, Asia

A puja adorned with prayer flags on the Khumbu glacier at Everest Base Camp, Khumbu Region, Nepal, Himalayas, Asia

The last village on the Everest Base Camp trek lying at 5100m, Khumbu Region, Nepal, Himalayas, Asia

Everest Base Camp at the end of the Khumbu glacier lies at 5350m, Khumbu Region, Nepal, Himalayas, Asia

Everest Base Camp at the end of the Khumbu glacier lies at 5350m, Khumbu Region, Nepal, Himalayas, Asia

Everest Base Camp at 5350m seen here as a scattering of tents in the distance at the back of the Khumbu glacier, Khumbu Region, Nepal, Himalayas, Asia

A trekker in the Everest region on the way up to Everest Base Camp seen here walking in front of Cholatse, Khumbu Region, Nepal, Himalayas, Asia

Everest Base Camp at the end of the Khumbu glacier lies at 5350m, Khumbu Region, Nepal, Himalayas, Asia

Everest Base Camp at the end of the Khumbu glacier lies at 5350m, Khumbu Region, Nepal, Himalayas, Asia

Everest Base Camp at the end of the Khumbu glacier lies at 5350m, Khumbu Region, Nepal, Himalayas, Asia

Everest Base Camp at 5350m seen here as a scattering of tents in the distance at the back of the Khumbu glacier, Khumbu Region, Nepal, Himalayas, Asia

A Sherpa near Dingboche hauling gear to Everest Base Camp for the climbing expeditions stops for a quick rest, Khumbu Region, Nepal, Asia

Yaks, the beasts of burden in the Himalaya, on their way to Everest Base Camp, Khumbu Region, Nepal, Asia

Suspension bridge crossing Kyashar Khola, with Dudh Koshi river, Monjo, Everest Base Camp Trek, Solukhumbu, Nepal, Himalayas, Asia

Trekkers arriving at Everest Base Camp, Solu Khumbu Everest Region, Sagarmatha National Park, Himalayas, Nepal, Asia

Trekkers on trail beside Dudh Koshi river, between Phakding and Namche, Chumoa, Everest Base Camp Trek, Solukhumbu, Nepal, Himalayas, Asia

A Sherpa working at Everest Base Camp, Khumbu Region, Nepal, Asia

A climber at Everest Base Camp the day after he has attempted climbing Everest showing signs of exposure at high altitude, Khumbu Region, Nepal, Asia

Yellow tents at Everest Base Camp, Solu Khumbu Everest Region, Sagarmatha National Park, Himalayas, Nepal, Asia

Sherpas return to Everest Base Camp after taking equipment to Camp 2, Khumbu Region, Nepal, Asia

Climbers return to celebrations at Everest Base Camp, Khumbu Region, Nepal, Asia

View from Everest Base Camp over Khumbu glacier towards Khumbu Icefall, Khumbu Himal, Sagarmatha National Park, Nepal

View from Everest Base Camp over Khumbu glacier towards Khumbu Icefall, Khumbu Himal, Sagarmatha National Park, Nepal

Climber between bizarre ice sculptures of Khumbu Icefall above Base Camp, Mount Everest, Himalaya, Nepal

Female climber with crampons on a rope in lower Khumbu Icefall, Base Camp, 5300m, Mount Everest, Himalaya, Nepal

Tibetan Buddhism, Rongbuk Monastery, white stupa, Mount Everest, base camp north side, the Himalayas, central Tibet, U-Tsang, Tibet Autonomous Region, People's Republic of China, Asia

View from Everest Base Camp over Khumbu Gletscher towards Khumbu Icefall, Khumbu Himal, Sagarmatha National Park, Nepal

Sherpa at a Puja ceremony for the goddess Miyo Langsangma, Base Camp, 5300m, Mount Everest, Himalaya, Nepal

Tibetan praying flags between the tents in the Base Camp, 5300m, in the back the summit of Mount Lingtren, 6600m, Mount Everest, Himalaya, Nepal

Yaks pack good and supplies from Everest Base Camp and Gorak Shep down the trail to lower elevations in the Himalayas.

Hikers silhouetted against a sunrise mountain backdrop above Dhugla, 16,000ft.-trek to mt. everest base camp.

The medical tent at Everest Base camp. The tent is in operation for the whole of the climbing session on Mount Everest.

Mountaineers climbing up the Khumbu Icefall on the route up Everest, Everest Base Camp, Khumbu, Nepal

Mountaineers climbing up the Khumbu Icefall on the route up Everest, Everest Base Camp, Khumbu, Nepal

High Mountain Rangers Tom Ditola and David Weber are taking a rest on the West Rib on Mount McKinley, Alaska. Mount Hunter in the background. They are above the clouds in blue sky and the sun is shining. Mount McKinley, native name Denali, is the highest mountain peak in North America, with a summit elevation of 20,321 feet (6,194 m) above sea level. At some 18,000 feet (5,500 m), the base-to-peak rise is considered the largest of any mountain situated entirely above sea level. Measured by topographic prominence, it is the third most prominent peak after Mount Everest and Aconcagua. Located in the Alaska Range in the interior of the U.S. state of Alaska, McKinley is the centerpiece of Denali National Park and Preserve. Every climbing season High Mountain Rangers of the Denali National Park Service are called to help climbers in need. If possible the patient is brought down to base camp on foot, only in life threatening conditions a helicopter is called to evacuate the patient to a hospital in Anchorage.

Mountain ranger Brian Scheele on this way to Windy Corner on Mount McKinley, also know as Denali, in Alaska. He is pulling a sled, that together with his heavy backpack is containing all the gear like tents, clothing and food. Every climbing season High Mountain Rangers of the Denali National Park Service are called to help climbers in need. If possible the patient is brought down to Basecamp on foot, only in life threatening conditions a helicopter is called to evacuate the patient to a hospital in Anchorage. Mount McKinley, native name Denali, is the highest mountain peak in North America, with a summit elevation of 20,321 feet (6,194 m) above sea level. At some 18,000 feet (5,500 m), the base-to-peak rise is considered the largest of any mountain situated entirely above sea level. Measured by topographic prominence, it is the third most prominent peak after Mount Everest and Aconcagua. Located in the Alaska Range in the interior of the U.S. state of Alaska, McKinley is the centerpiece of Denali National Park and Preserve.

Night scene of a dining tent at the Everest Base Camp. The summit of Everest is blocked by part of the ridge that extends out on the left, while Nupste can be seen on the right of the picture. The infamous Khumbu ice fall can be seen as the rubble that pours out in the middle of the picture, Nepal

Stone carvings seen in a rock alongside the trail to Everest Base Camp, seen with the peak of Ama Dablam in the background, Khumbu, Nepal

A prayer flag attached to a ice pinnacle at Everest Base Camp

Mountaineers climbing up the Khumbu Icefall on the route up Everest, Everest Base Camp, Khumbu, Nepal