I recently started volunteeering as a guide runner, available to train and race with visually impaired runners.
If that sounds like something you could do, please click on the link above!
Should have mentioned: if that doesn't sound like something you could do, charity: water is my favorite "traditional" charity. 100% of donations go to actual water projects; their overhead is completely philanthropist(s)-funded. I challenge my classes every year to donate/fundraise enough to build a well a year!