West of Cambridge near Elsworth Village, the Elsworth Moto Park has tracks open to trail bike riding. There is a 1.3 mile track with every type of jump. Open Wednesdays and some weekends (call first), weather permitting.
To reach the dirt biking at the parc from Cambridge, head west on A428 for 8 miles. Head off the A428 at Cambourne intersection and take the slip road signed Elsworth. Continue for 1 mile and look on righthand side for parc.
Overall, Elsworth Moto Parc is the 6th most popular dirt bike trail of all 36 dirt biking rides in UK.