How many participants are there at the HMDS? Customer Service team October 25, 2021 06:20 Updated We have an average of 500 participants per edition, but the number can vary depending on the destination and edition. Related articles What is the cut off time? How many checkpoints (aid stations) are there on the route? What level is required to participate at the HMDS? What is the list of mandatory equipment? What is the organization around water during the HMDS? Comments 0 comments Article is closed for comments.