Question: Reebok is the official footwear and apparel sponsor for a series of obstacle races of varying distance and difficulty ranging from 3 miles to marathon distances, and are held in the US and franchised in how many countries?
Sentence (from "Judged trail ride"): A Judged trail ride is a type of trail riding popular in the western United States where horses and riders are asked to travel a natural trail for a set distance (usually 10 to 15 miles) with occasional stops for the horse and rider team to negotiate an obstacle, usually with varying options for difficulty, with higher scores given for completing the more difficult version of each obstacle.
Relevant evidence: No