You can see the tab that is titled “Race Links”. I am currently adding New England based obstacle races, road/ trail/ ultra races and obstacle training facilities.
If you know of any that are not linked , or run a race series you would like to see linked, head over to the contact page and get in touch.
Over + Under It 
I’m glad you are doing this because I was adding in a database of unique races when I get my site up. For gear, regional races and unique training opportunities/locations it is easier to link to sites that already have done so to avoid reinventing the wheel.