Gelu started for the summit at 5:00 p.m. on May 25, 2003, and reached on the summit at 3:56:46 a.m. on May 26. He returned to Base Camp at 11:20 a.m. on the 26th. (It is also reported that upon reaching the top, Gelu hoisted the Nepalese flag on a 6-foot-tall (1.8 m) brass pole.) The total time of his climb from Base Camp to the summit and back to Base Camp was 18 hours 20 minutes.
The record he beat (12 hours 45 minutes) was set just a few days earlier on May 23, 2003 by 25-year-old Pemba Dorjie, a Sherpa from Rolwaling Himal.
Lakpa Gelu was the climbing Sardar of the 12-member "Jubiläums Expedition Mt. Everest 2003". He began his ascent of Everest from the Southeast Ridge under the leadership of Eckhard Schmitt, a 56-year-old mountaineer from Schaftlach, Germany.