Marble Races with a cheap pool noodle (occupies the kids for hours.) Did this, but instead of cutting the pool noodle, the marble is small enough to fit inside the full noodle to roll down. Then can use the noodle for other things too!
Fun outdoor game for kids and adults. Use frisbees and paint the back side of them. How to make a unique bean bag toss game from terra cotta pot saucers and a printable (which you can get for free by clicking through!
We could make one of these at the end of the series to affirm our determination to Run the Race. Each person comes forward and puts their handprint on as a sign of their commitment to running the race.