First ride (slow road ride in business park) since August a few weeks ago. Blew knee up mid August with level 3 MCL sprain, and then meniscus surgery in November. 

Thinking about trying some light trail work this weekend. Miss being in the woods.

Had 2 ACL's and a broken Tibia. That's 3 rehabs.

Keep ridding the Biz park until you feel confident enough to go else where. If you go to Physical therapy they will have you on the bike for 20 mins. THis is good for range of movement and relieving the fluid and swealing but doesn't do enough to help with knee stability strength. I still had to ride a trainer everyday to keeps the swealing pumped out. A cheap elastic brace will help prevent it from loading up again after riding.
 

Doing Lunges will help accelerate knee stability so will squats. I also did some back and forth lateral movement with the knee slightly bent. Kinda like you see footabll players do. Stairs can also build the main knee support muscle. 

Trailwork could be sketchy due to un even surfaces and tripping over roots. Stick to clean paths. Don't wander off the trail there are too many holes and dips you may not see under those leaves. 

Yeah, I had to fight the urge to finish up some stuff at the school trail this morning and go see what Cyclepath was up to at Fisher afterwards. I kinda like trail work in a light snow. Knee and slick uneven surfaces not friends for awhile.