Belt traps for a belt drive system include a bracket configured to receive at least a portion of a pulley to capture a failed drive belt between the bracket and a pulley. The pulley may be a tensioner pulley and may be biased in a direction towards the bracket. The bracket may include a relief portion configured to receive at least a portion of the pulley. The relief portion may include an opening or a recess that is sized and shaped to receive at least a portion of the pulley.