The Tablelands Trail in Gros Morne National Park is one of the most extraordinary and scientifically significant hiking experiences in all of Canada a place where you walk directly on rock from Earth’s mantle, exposed at the surface by ancient tectonic forces. This geological phenomenon is so rare and scientifically important that it helped earn Gros Morne its designation as a UNESCO World Heritage Site in 1987. Nowhere else on Earth can you walk so easily across mantle rock that has been thrust to the surface like this.

The trailhead is located on Highway 431 between Woody Point and Trout River in western Newfoundland. From the moment you step off the parking area and onto the trail, the landscape announces itself dramatically. The world shifts from the lush greens of the surrounding Gros Morne forest to a vast, eerily beautiful plateau of rust-orange and amber rock. This is peridotite ancient mantle rock that has been oxidizing in open air for millions of years, creating the distinctive warm, rust colour that makes the Tablelands so visually striking and so unlike any other landscape in eastern Canada.

The geological story of the Tablelands begins over 450 million years ago when tectonic plates collided with extraordinary force, pushing a slab of Earth’s mantle rock up through the crust and onto the surface. What you walk across today is a direct fragment of the same type of rock that normally sits 30 to 80 kilometres beneath your feet. The high iron and magnesium content of the peridotite makes the soil toxic to most plants, which is why the Tablelands appear so barren compared to the surrounding landscape. Yet life has adapted. Unique plant species, including pitcher plants and other specialists that tolerate the mineral-rich soil, survive here and can be spotted along the trail.

The main Tablelands Trail is approximately 4 km return and rated easy to moderate, making it accessible to a wide range of hikers including families with children. The path follows the valley floor through the peridotite landscape, ending at a river crossing. For those who want a longer challenge, an extended off-trail loop of approximately 14.75 km takes experienced hikers to the top of the Tablelands plateau for panoramic views of the Earth’s mantle from above but this extension requires GPS navigation and should only be attempted by those with backcountry experience.

Parks Canada offers guided interpretive tours of the Tablelands during summer, led by knowledgeable naturalists who bring the geology and ecology of the area to life. These are highly recommended and available at the Trout River Discovery Centre. The Tablelands is one of those places that is even more awe-inspiring with context knowing what you are walking on makes every step feel extraordinary. A Parks Canada entry pass is required to access the trail.