Route files stored in memory

I have a Garmin Nuvi 750. I have a long motorcycle trip coming up soon and an operational question came up that I can't seem to find an answer for.

We have routes set up for each section of the trail that we will be riding. We will be riding multiple routes each day, but not more than 10 routes. My thought was to load that days' routes into the Nuvi's memory and start riding. The question is what happens when we get to the end of the current route? Do we have to stop and load the next route or will it pick up automatically?

Thanks,
John