I found a way to make a multilap race with a remote start location:
Start with a multilap Start/Finish block,
then a bit of track and a Finish block,
then some more track and checkpoints,
then back to the Finish block.
Each time you pass the Finish block it will count a lap and you don't have to go back through the "Multilap" block again.
Just be sure not to place any checkpoints between the Start/Finish/Multilap block and the Finish block.
A Simple Example:
