There are 4 Ninja Turtle Half Marathons, one for each radical Dude! If you complete ALL 4, you get a special BONUS medal! You can absolutely register for just 1 race, but ONLY those that complete all 4 will be eligible for the 5th bonus medal. If you wish to complete all 4, please register for the Half Shell Challenge, not each race separately. There is a 5K distance available as well with its own medal style.If you register for the Half Shell Challenge, you also get entered into a drawing for an Allied Medal display. If you register for the Challenge AND the 5K, you get an additional entry. If you're signed up for the Challenge and also donate to my LLS fundraising page, you get an additional entry for every $5 donation. Be sure to note that your donation is for the Half Shell Challenge so you get your extra entries.