There is a selection of cross country ski trail loops, the most difficult being the green, which is 15km in length. You can add this with some of the other trails to make a good long ride. These trails are very old and very fast. It is very up and down so you will not notice the climbs and your asdrenaline gets fired up but you feel it after. Watch out for old tree stumps there is a couple areas where small trees were taken town to widen track and stumps are very easy to catch and at speed, you could do damge to yourself. If you take some of the crossing fire roads you can get miles and miles of skidoo and motocross tracks There are some pretty wild trails if you spend enough time looking for them. They can be hidden but are worth the effort.
How to get there:
Take Hwy 401 east to Cobourg exit (Hwy 45). Take that north past Baltimore look for Beagle Club Road on your left and follow that into the parking lot. Look for Northumberland ski trail sign.