Yep, up through sylmar veterans park. It's kind of washed out and with rubble due to the latest storms. I've taken a road bike with small tires (28mm) in the past multiple times, likely do-able although you might not have as much fun. I can describe it as a crappier Trash Truck (backside of Griffith) with no cars. Get tacos on Glenoaks after your descent back into the valley.