The R100 dates are posted on the website.
http://www.r100.org/
I've never been to one, but I've heard they are a blast! I just finished registering for the two Wisconsin dates.
Heres a copy of the 07 calander.R-100 Schedule 2007
March 3rd & 4th Barnesville, GA
Marcher 10th &11th Tyler, TX Bucks and Ducks
March 12th & 18th Mesa, AZ Usery Mt Bowmen
March 24th & 25th Escondido, CA Bear State Bowmen
March 31st & April 1st Bennett, CO Archery Adventures
April 21st & 22nd Sedalia, MO State Fair Archery
April 28th & 29th Lindsborg, KS Smoky Valley Archers
June 2nd & 3rd Olympia, WA Capital City Bowmen
June 9th & 10 Pocatello, ID Pocatello Field Archery
June 16th & 17th Horicon, WI Horicon Marsh Bowmen
June 23rd & 24th Brownstown, MI Lincoln Bowmen
June 30th & July 1st Caldwell County Kings creek Hunting Club
July 7th & 8th Greenwich, CT CosCob Archers
July 14th & 15th Mercer, KY Mercer County Archers
July 21st & 22nd Greencastle, PA Greencastle Sportsmen’s
July 28th & 29th North Royalton, OH South Cuyahoga Sportsmen
August 11th & 12th Sparta, WI Sparta Rod & Gun Club
August 18th & 19th Wabash, IN Bass and Bucks, Inc
August 26th & 27th Central City, IA Hitaga Archery Club