Rob, TSD stands for Time, Speed, Distance.  It is a road rally were the organizers establish a specific distance that needs to be travelled in a certain time period, usually requiring the route to be completed staying under the speed limit.  There are usually multiple check points along the way.  

Bob, I was hoping my son would show interest but so far, he doesn’t want to try it.  If I can find one nearby, I’ll reach out and maybe we can team up on one.

Has anyone participated in any TSD rally's?

I wanted to try one, but will need a partner.

I don't think my 9 year old is interested or up to the challenge.

Greg