To locate yourself on the site maps, simply go to the Routes tab (bicycle icon) and tick the "Locate me" box.
Your position is updated continuously. Untick the box to stop the geolocation.
To toggle the accuracy display on/off, click on the position marker.

Important Your position is known only to you. For privacy reasons, no location data is sent to the server. On mobile, the geolocation feature does not use your data plan.