The Gbomb is a Mountain bike endurance race held in Bom Bom State forest near Grafton, hosted by Grafton Cycle Club's Mountain Bike team called Bom Bom Racing. For 2024 they have returned to the 12hr and 6hr lengths for teams and solos, they've expanded the 2hr category to cater for more solo categories as well. The race is aimed at all ages and abilities to test the fittest and be fun for the social riders. With categories for Solo or Team riding split across all ages from 11-100, as well as catering for riders on e-bikes or Adaptive bikes. This event is supported by AusCycling, Clarence Valley Council, NSW Forestry Corporation, Grafton City Cycles, Cyclesport Grafton.