Stage 4 is 1 lap of the "Volcano Climb after party", which is described as follows (make sure you read to the end )I think stage 4 is flat (it says Volcano flat 4 laps) - you should be able to put some good time on Lee
If you know your Watopia routes, the easiest way to understand this route is as two laps of Volcano Flat followed by a lap of Volcano Climb ending at the volcano KOM banner. This means the first 36km (22.4 miles) of the route is quite flat, but the final volcano climb wraps it up in painful fashion. In fact, nearly half the route’s vertical gain comes in the final 4km!