Portage trails are varied in length and can be anything from an easy walk through the woods to a muscle challenging trail that would test the most athletic woodland traveler.
Many portage trails cross bodies of water which are not navigable by canoe. Bridges of all sorts can be found throughout canoe country. These range from simple planks of wood which test our sense of balance to engineered crossings complete with railings. Most deep woods crossings are made from logs gathered in the surrounding area or rocks thrown into strategic places.
This video displays one method of crossing a marsh area. I describe marsh-land as a submerged or a semi submerged area which has a tendency to suck shoes off unsuspecting hikers.
This building method maintains water flow and helps to mitigate damage to the wetland. Nails and fasteners are not required.