Links to the organizations related to the Human Power Challenge:

Oregon Human Powered Vehicles 

Fort Stevens Recumbent Retreat 

World Recumbent Racing Association 

Human Powered Race America 

Bent PAC NW 

British Human Power Club

Velomobiling.net 

North American Velomobilist Website

WISIL Recumbent Club 

Recumbents.com

Electrathon America