Tilak Padney of Nepal's Mountaineering Department says 35 foreigners accompanied by 29 Nepalese Sherpa guides reached the 8,850-meter (29,035-foot) peak this morning after climbing all night from the highest camp on South Col.
All were reported to be safe.
Among them was Raha Moharrak, who became the first Saudi Arabian woman to scale the world's highest peak.
Everest can be climbed from either Nepal or Tibet.
May is the most popular month for Everest climbs because of more favorable weather.