Mount Manaslu kills more than 150 on Hong Kong 's Avalanche . Natural disaster revives concerns about crowding on Grayson Schaffer peaks . But with Mount Manaslu playing host to some 231 mountaineers from 25 teams this season -- an unusually large number for the world 's eighth largest peak -- the natural disaster is likely to revive concerns about whether the Himalayan mountains favored by commercial expeditions are becoming too crowded . Mount Everest saw 'traffic jams '' in May this year . Big peaks attracting more inexperienced climbers .
Mount Manaslu kills more than 150 on Hong Kong 's Avalanche . Natural disaster revives concerns about crowding on Grayson Schaffer peaks . Mount Everest saw 'traffic jams '' in May this year . Big peaks attracting more inexperienced climbers .