In the classic surf film "Endless Summer," Bruce Brown and Co. chase swell and seasons across hemispheres, because, well, it's always summer somewhere. 

In the United States, that somewhere happens to be Florida. When it's minus 40 degrees in Minnesota in January, in the Sunshine State, it's a balmy 72. 

The weather is the driving force behind why so many snowbirds flock there for winter, and why so many of the fastest-growing U.S. cities are in that state. 

Additionally, Florida's copious coast line (1,350 miles) and park lands (over 2.5 million acres between state and national parks) are the stuff of dreams. And like pretty much everything else on this green Earth, they're best explored via ebike -- despite nightmare-inducing factors like gator crossings, the lack of a helmet law, and huge arterial roads with insane-o drivers.

It's here, at the intersection of nature and activity, that is the sweet spot for Sarasota-based Endless Summer Eco Tours and Ebike Rentals. For visitors and tourists alike, a sunset tour on the pure quartz sand of Siesta Key Beach on a RadRover, or a wildlife-spotting mission around Myakka River State Park, is a bucket-list worthy to-do, and founder/owner Derek Wilson knows it. 

It's fitting, then, that we share his Rad Story on this, the longest day of the year, and the first day of summer -- in places where that season still exists, anyway.