How do I keep the workout screen on my Apple Watch from blocking the directions from Maps?

I've put in directions to get somewhere new on my iPhone and I want to see them while I bike there. Everything's working great until Workout decides knowing my heartrate is more important than the directions. I'd like to have Workout running and track things, but it's a much lower priority than getting to my destination. Is there a way to keep Workout in the background if I'm plotting directions?

Also, I'd still like to see the Workout screen if I don't need directions.