Hi Pete,
There is not currently a way to edit routes on the website.
On the iOS app there is not currently a way to add points to the beginning of a route, as a workaround you can move the first point to where you want the first point to be, then add additional points between the first and second point. Adding more control to the route editor is on my todo list, but we don’t have it scheduled yet, so I can’t say what version it will appear in. I’ve been thinking about adding a reverse button, so to add points to the beginning of the route you can open it for editing, reverse it, add points, then reverse it again, but this design is not finalized and might change before it gets implemented.
Happy Hiking,
Jesse Crocker
Je...@GaiaGps.com