This won't be an exhaustive list but I will try to keep it up to date and include as much as I can. Email me at email@example.com if you know about an Ottawa or Gatineau event that I don't have listed.
Ongoing: Sensory Friendly Films at Cineplex
May 10th: Garage Sale for Autism Speaks at 1002 Byron Ave.
May 31: Walk Now for Autism Speaks (fundraiser)