You can access the itches from the north or the south. Either way, you're in hilly terrain right away. The north access point is about 35 m higher than the south access point so I guess it's better training to start from the south but we just go there because it's a shorter drive!
We started and finished at the south access point at the dead end on 5th Line E. north of Hockley Rd. You can see this on our GPS track. 5th Line is the first north-south road west of Airport Road.
Alternatively, you could go north on 4th Line and head east on 15th Sideroad until you get to the Anderson Tract entrance, which is the northern access point for the itches. It's marked with blue Bruce Trail side trail blazes and there is a small gate.
It's a great place to get in lots of elevation gain in a relatively short distance - by southern Ontario standards, anyway.
You can also park in the small lot on the east side of 5th Line just south of Hockley Rd. Using that part of 5th Line (closed in winter), the two Bruce Side Trails that enter the woods there, and the main trail heading east toward Airport Road through an old ski resort, you can get in a different hill workout.