This is a 3 minute trip through an underground railroad. I made it to get from my inland base to the nearest beach. It's 1,369 track pieces not counting booster tracks. There are four booster sections.
Going from outside my main base, into the base, taking a cart to the top of the mountain, then down into the valley and across into my workshop for the construction of a huge valley-spanning bridge. Uses minecart boosters...
