You can now add Custom Waypoints onto the routes you create on Web! Insert waypoints anywhere on your route to denote key points like aid stations, bathrooms, views or even when you're supposed to take your next gel. Try it out today under Explore > Create a Route. Place your waypoints on the route, then click the waypoint that you want to customize.
Bonus tip: If you have a compatible Garmin device, these waypoints will transfer onto your device when you sync your route. This means that you will be able to see how far away your nearest waypoint is while on the go— so you never have to wonder "how far until the next coffee shop/aid station/water stop" again.