Mountain bike training race series held at Winnekenni Castle/Plug Pond in Haverhill with evening races featuring safety cutoffs before dark.
- Four-race series with A and B categories
- Multi-lap format: 2 laps for B race, 4 laps for A race
- Approximately 3-mile laps with 300 ft elevation gain per lap
- Flowy, smooth, and twisty course with some rough sections