whats the longest train journey you've ever experienced ?

From London, England, to Bari, Italy, via changes in Paris and Verona, approx 1300 miles. Marginally further than other journeys from London to Barcelona, London to Vienna, or Hamburg to Budapest.

Philadelphia to Chicago, via Washington DC and Cincinnati.   I wanted to experience a long distance train trip while they still existed 

REPEAT QUESTION REPORTED.

In 1963 we travelled by train on a cross country vacation from Los Angeles to the Kiwanis national convention in Atlantic City. After the convention we went to Washington, DC, New York, up into Canada, back down to Illinois, Ohio and then back home visiting family and sightseeing. The total trip was probably close to 6,500 miles by train.. 

About 350 miles, which takes all day when stops are included. But the seats are comfortable enough, the restroom is close with no line, and you can bring your own food.

Maybe 75 miles.           

sadly I've never even been on a train before. I really want to go on one though