Pick a type of walk:

Walk-specific settings:

Extras:

1. Random Walk: The walk will start at the centre of the map. "Step size" and "number of steps" should be obvious; they're measured in pixels. For a real random walk you pick a direction from 1-360 and take a step; this tends to zigzag back on itself quite a lot. If you're using the "make circular" checkbox, this is fine. If not, we can add a "straightness" fudge factor: instead of rolling one 360-sided dice, we roll (say) six 60-sided dice and add them up. The more dice you roll, the more the results cluster around 180 degrees, and the more you end up heading in a straight line...
2. Beerglass Walk: As popularised, if that's the word I want, by beerglasswalks. Instead of a circle, you get a polygon centred at the centre of the map; you can select how many sides, and the radius (i.e. centre-to-vertex distance) of the polygon. You can also rotate the shape anticlockwise by some number of degrees, if you feel the need.
3. Themed Walk: Search a database of businesses for a particular term, and create a walk from up to 20 of the matching locations. It will attempt to arrange them into a vaguely sensible walk, but I make no guarantees...

Extras

1. Zoom to route resizes and recentres the map after a new route is drawn.
2. Driving route tries to create a driveable route between the points (this is usually useless).
3. Show pushpins / number pushpins are toggles that allow you to have no pushpins, unnumbered pushpins, or numbered pushpins.
4. Show URL is an ugly hack that generates a bookmarkable URL for your route, which appears below the map. For themed walks, the route is saved but the details of each stop aren't.
5. Make circular adds a final link back to the beginning of the walk, and reorders the points to make it less zigzag. The starting point remains fixed.