The good-looking fellow in the circle is Jim McKinny.  
If you were a member of this jump course please contact Jim at:
1708 Ruth Street East
Saskatoon, SK  S7J 0L9
phone (306) 373-6578

The request to contact the above is related to a disability pension application.  
The jump course was held in August 1953.  
A response from any of the trainees in the above photo would be appreciated.