Because Saturday is going to be a bit of a hilly day (though not quite as hilly as the picture makes it seem), I went for a run by the river with some of my fellow canicrossers this morning. We are all running the 7k/8k* - EEK! - green route in the picture - so we kept it easy: a gentle jog, a short walk, rinse, repeat. And we kept it flat. Very flat.
*We signed up for 7k, but between planning and execution the route seems to have grown a bit.