Complex sentence: It is notable as the last overnight stop with lodging that climbers make on their hike toward Everest Base Camp when attempting an ascent of Everest via the standard Southeast Route.
Split into simpler sentences: It is notable as the last overnight stop with lodging on the trail to Base Camp. A hike that climbers make on their way to Everest Base Camp (South) when attempting an ascent of Everest via the standard southeast route.