Though the vineyards won't have any grapes left, and you may not see any blue sky, visiting wineries and vineyards by bike might be the best way to work off any Thanksgiving-induced lethargy.
Fortunately, it's wine country Thanksgiving, and most everybody will be open for tasting Friday through Sunday!
Saturday and Sunday the Salem Bicycle Club offers rides, a 40-mile ride on Saturday at 10am and an easy 22-mile ride on Sunday at 1:30pm. Both rides leave from the red lot just north of McDonald's and west of Safeway (bounded by Center, 12th, Marion, and Capitol).
If you know of other rides, drop a comment!