You'll be in Borden?
Just take the Endo and maybe the roadie if you want to road ride. Personally I'd leave the roadie at home and just xc ride.
By heading out the Lisle gate from the end of Range Road you are about 10 minutes from some great xc riding.
Dufferin Forest in Mansfield is littered with singletrack. Most of it super fast and flowing old moto trails from the 70's. This will be your best after work rides. Show up on Tuesday and Thursday about 6pm and the usual suspects should be out for a ride. A rag tag group of guys have been riding every Tuesday and Thursday their since about 1994.
Forget riding Blue mountain for "DH", but make the 30 minute drive to Collingwood area for the fun xc/am. There is riding all along the Niagra Escarpment, some of it know, much of it unknown. If you meet up with the right group riding Mansfield you'll tap into 10 or 15 spots with 100's of kms or rolling singletrack. Everything from smooth buff and fast to endless tech rock gardens.
Leave the V-Tach at home.