Mikey,
The loop around the pond and filter system equals just over 100 feet of track.
karenj,
The track is quite sturdy being brass and the roadbed is made of wire reinforced concrete about 2 inches thick so the track can be stepped on without damage.
The "tunnel" by the filter system is actually the train "garage" where I can park the train without storing it in the shed. The top of the "garage will lift off if I need to access the train inside.
The Orange Blossom special was a train that travelled between New York and Florida. In the year of my birth, 1939, two fiddlers (Ervin Rouse and Chubby Wise) toured the train and were so impressed by it they wrote the tune.
Many have performed the song, but my favorite and the version I used was done by Billy Vaughn and released in 1961.
Her is what the train looked like: