A happy bike is one that's not sitting in the garage ...
A happy Diva is one who's not stuck in the house!
If the temperatures stay cold and the snow continues to hold off, the trails at Hillside and Campbell Tract are fine for riding without studs or snowcat tires. The narrow trails, like Rover's Run and Lynx, are especially nicely packed. The wider trails, like Viewpoint, have more loose snow because skiers, walkers, and riders have more trail width to choose from.
If you're feeling adventurous, try one of the new singletrack loops or Birch Meadow along Campbell Creek.