(1) A trail building technique that raises the trail bed above wet, boggy areas by placing mineral soil over fabric between parallel side logs or rocks (along the edge of trail tread).
The tread must be "crowned" or raised, and ditches need to be dug alongside the logs or rocks to provide drainage.
(2) Or, try this...A turnpike is a road or trail constructed from a combination of gravel, soil, and other filler to make the tread higher than the surrounding water table. Turnpikes are useful in low-lying areas with poor drainage. And boardwalks are often used to accomplish the same goal instead of turnpikes.
(1) The turnpike allowed us to keep our feet dry, and we also managed to stay out of reach of the bog monster, though we threw it all our spare food, just to be extra safe.
(2) A turnpike sounds fancy (and dangerous in a high-speed way), but it's only something to help keep your feet dry (while avoiding the bog monsters).