On most years, travel within the Solar System is severely limited this time of year. The summit gets many feet of snow, and Bowman Road itself is closed long before you reach the turn-off to Grouse Ridge. However, I suspect that much of the system is reachable.
Pluto has been logged recently, and I would assume Uranus it not snowed in. The Loch Leven Trail is so heavily traveled that I would not be surprised to find it open, even if there is a certain amount of snow in the area.
If you have been hiking around Grouse Ridge, Cisco Grove, or Loch Leven, please post something here to let us know the conditions.