Over the next few weeks, I built Walking Route, which lets you generate a custom route of any length or quickly generate routes 5,000 steps or 10,000 steps in length. Plus, the route will always return you back to where you started from.
I live in San Francisco and since it generates a new walking route every time, one of the unexpected consequences was that it helped me explore areas of the city I probably wouldn't have checked out otherwise.
It's completely free and has helped me maintain my stay active during quarantine, just wanted to share it with this community as well:
https://apps.apple.com/us/app/walking-routes/id1554790655