Avalanche Bowl is a steep, short run just to the east of Chair One. It's somewhat exposed to the wind, and the ground beneath it is fairly rocky, so it requires a reasonable amount of snow to get it open. When it is open, however, it's a great run. The best and deepest snow is generally to the skier's left (west). Take care to look for rocks far skier's right if it's full open. It's a boulder field under the far right side of A-bowl and it takes a fair bit of sticky snow to cover it up and not get blown off. I've gotten more than a few good powder turns skier's right however - fear of rocks and the unknown keeps it less skied.
From the bottom of Avalanche Bowl, you can go right into Zoom (or keep going right to lower Over The Rainbow), or left into Avalanche Bowl (or keep going left to lower Cat's Meow).