RCAC
Rock Crawl Against Cancer amateur series
http://www.pirate4x4.com/forum/showthread.php?t=562892
Some of the following was taken from the above: - copied without permission as "fair use".

The RCAC is a fundraising event to raise money to help fight cancer.
All proceeds from the RCAC events for 2007 will be donated to the National Breast Cancer Foundation.
Come join us to help fight a terrible disease and have a great time in the process.
Based in Mid America the RCAC will be a 3 event series for 2007.
The Amateur Rock Crawl competition is designed to be easier and less stressful that a pro rock crawl event. The courses are setup so a stock rig can make it thru with little damage. Chance of rollover is very limited. Anyone can enter and all vehicle types are allowed.

First event date is:
Saturday May 19, 2007 at Disney, OK
Tech and sign up starts at 0730
Racing starts at 0900.
Trials motorcycle exhibition at 1300
Entry fee is a donation to the fundraiser. You choose how much you want to give.
Prizes are trophies for top 3 positions.
Spectators are free. Refreshment vending will be available.

Vehicle classes:
The vehicles will be split into 4 classes.
Small Tire – 4 wheeled production vehicle w/ 35” or smaller tires.
Big Tire – 4 wheeled production vehicle w/ 36” or larger tires.
Buggy – Highly modified, custom built or specialized off-road vehicles.
X – quads, motorcycles, go-karts, or any other type of vehicle.
(Classes will be determined by RCAC officials at tech signup. If you have a question what your rig will fall under contact Tolly for clarification.)
Safety – All vehicles must have first aid kit, fire extinguisher, seat belt restraint system, and valid federal requirements liability insurance coverage.

Rules summary:
Competition is based on a points system similar to other rock crawling sanctions
Each team must negotiate thru a series of stages incurring the least amount of points as possible. Team with least amount of points wins.