MARQUETTE -- Registration is now underway for the 21st annual Tour Da U.P. bike marathon.

The U.P. tradition raises funds for the Teaching Family Homes organization, a group aiding abused and neglected children.

Organizers say the $400 entry fee will help improve the campus facilities, including trails and renovating buildings.

"It's a great, healthy environment," said Richard Rossway of Teaching Family Homes.  "You're going to find some camaraderie, you're going to meet some friends along the way.  And plus, you're doing it for a great cause.  I think you'll learn a lot more about our organization and ways to really help people in need."

Bikers looking for a shorter trip may sign up for the one-day tour from Marquette to Munising, August 7.

To register for either the five-day or one-day event, head to the Tour Da U.P. website.