Overnight packs could be 30-60lbs. Multi-day trips up a serious mountain may be closer to 60lbs.

Soldiers in the military sometimes carry substantially more:

• marines
  • sometimes up to 100 lbs, or even 130 lbs!
  • 70 to 80 pounds daily
  • A 2001 Army Science Board study recommended that no soldier carry more than 50 pounds for any length of time.