Route 66, and its 2,500 miles, is known affectionately as "The Mother Road." It's the quintessential cross-country road trip experience. From Chicago through the beating heart of America and down to Los Angeles, the route officially ends at the Santa Monica Pier. The road reached peak popularity in the late 40's and early 50's before being officially removed from the US Highway System in 1985. After a few years, travelers from America and beyond started feeling tinges of nostalgia, and by the end of the 1980's it was fast becoming one of the most popular road trip routes once more.
Best time of year to travel along Route 66: The best time to road trip down Route 66 is between late April and early July, as well as late August through late October. The worst times to visit would be July and August, this is when the temperature is sweltering and all the kids are out of school, which means you'll come across some crowds along the route. In addition, July and August is considered high season, so you're going to be paying higher rates for lodging.