It's a barrel class with 3 divisions. Ugh. I'm blanking on how the divisions are set right now because I haven't had enough Diet Coke, but the fastest horses will be 1D, middle horses 2D and slowest are 3D.
ETA: I just found the explanation of the format. It's usually 4D, so that's how the NBHA explains it:
"Q: How does the 4-D format work?
A: All riders, regardless of ability, run in the same 4-D barrel race. The four divisions are then determined by time brackets. With the 4-D format, the OVERALL fastest time of the race is used to set the time brackets for the four divisions. The NBHA awards points to members IN ALL DIVISIONS on a 5, 4, 3, 2, 1 basis for first place through fifth place, regardless of the number of entries or paying places. · 1st Division: These are the riders with the fastest times. · 2nd Division: These are competitors who ran ONE-HALF (1/2) SECOND or SLOWER than the OVERALL fastest time. · 3rd Division: These are competitors who ran ONE (1) SECOND or SLOWER than the OVERALL fastest time. · 4th Division: These are competitors who ran TWO (2) SECONDS or SLOWER than the OVERALL fastest time."