The Grensland MTB event features the 6 uur van 't Zand, a six-hour mountain bike race held annually at Recreatiepark 't Zand in Alphen. This race is designed for both sportive and recreational mountain bikers; the field is not restricted to elite competitors.
Riders can compete solo, as a mixed duo, in a trio, or as a team of four. This format accommodates both endurance specialists and groups sharing the effort. Each category includes a separate women's classification, providing distinct results for women competing individually or as part of a team.