Types of Triathlons (Fat tire, road, off road)

Ok, im doing a project and need a little information about the different types of triathlons as in Fat tire, off road, and road.
Can someone please explain as best as you can the details about them? I dont know what to say about them really and Im having a hard time trying to find the information I need.
Many replies will be very helpful!
Thank you!!!

Hi Tricycling!

Triathlons are usually categorized by distance - ie Sprint (short distance), Olympic (middle distance), Half-Ironman (long distance) and Ironman (really freakin' long distance).

Within each race, the race organizers often have different categories and may choose to score those participating on mountain bikes separately from those riding road bikes, etc.

USA Triathlon is the national governing body for the multi-sport disciplines of triathlon, duathlon, aquathlon and winter triathlon in the United States.

Other sources of tri info:
Triathlete Magazine
Inside Triathlon


Hope that helps!

Thanks for the reply but not the answer im looking for :(
I know about sprint, olympic, half and full ironman thanks though.

I just wanted to know alittle information about the different types as in fat tire triathlon, off road triathlons.
I know that it has to do with the bike etc ...that is what im looking for. Information on that.

Thank you so much...!!!!
Shannon

Perhaps try contacting the race organizers for some of the MTB Tri events and they could point you towards more info re rules, officiating body, etc?

http://www.tbfracing.com/races.htm

http://redwoodtrails.com/final/triathlons.html