The Maya Mountain Adventure Challenge, the longest race in Belize, spanning over 300 miles in 4 days, was last week. The SIRH has a nice article with all the winners of the race. The next one is scheduled for 2018.
The Cayo Tour Guide Association also has a good article on the MMAC. There are 1000's of pictures on the MMAC page.
"Congratulations to the winners of The Maya Mountain Challenge 2016. Thank you to all of the racers, donors, volunteers, sponsors and spectators that made the 2016 Maya Mountain Adventure Challenge was an incredible success!"