A little explanation on 'trips' and 'routes':
The newer nuvi series don't have routes, they only support trips in 'Trip Planner' as dasilvarsa states, which are somewhat different to the 'Routes'/'Custom Routes' available in 14xx & 7xx which you are used to.
One way to look at them simply is to think of a Route as a single journey with a series of via points, and a Trip as a compilation of joined-up routes with no via points.
From MapSource or BaseCamp it is possible to send a route to a modern nuvi but it will be converted to a trip on the unit whereas it would still be a route on your older units.
Where you can view an entire route's details, in a trip you can only view the current stage or interval and there is no way that I know of to view the entire trip statistics.