Things To do

Kayaking, Horse Riding and Hiking Tours can be organized thought the concierge at the at the Fairmont Chateau Lake Louise.

White Water Rafting  - Wild Water

https://wildwater.com/

Banff Adventures - Summer Activities:  

http://www.banffadventures.com/things-to-do/banff-summer-activities.aspx

Guided Tours

http://www.banfflakelouise.com/Things-To-Do/Summer-Adventures/Sightseeing-Tours/Guided-Sightseeing-Tours