"The expansive area starts in Lukla and goes all the way to Everest Base Camp. A lifetime of boulders that get cleaner the higher you go. 27crags/google won't let me add other sectors such as Machermo (on way to Gyokyo), Dingboche (on way to EBC - awesome but limited), and the EBC area. Will find a way to post info about these areas. Chalk was evident on numerous rocks in the area, but expect to clean the really good lines.
In short - I brought a bouldering pad on the hike to EBC in 2004 - and so should you. Don't let the fact that some of these rocks have a 45 km approach at high altitude. The highest problem was at 5500m. Good times!