Niagara Glen is a stunning natural escape hidden in plain sight — a forested gorge tumbling down to the Niagara River just a few miles upstream from the roar and crowds of Niagara Falls, on the Ontario side. Reached by descending a steep metal staircase into the gorge, this Niagara Parks nature reserve is a world apart: a wild tangle of giant boulders, lush Carolinian forest, and rushing whitewater that feels far removed from the tourist bustle above.

The Glen is best known for two things: hiking and world-class bouldering. About four kilometers of trails wind among the rocks, past the dramatic Niagara Whirlpool and through one of Canada's richest Carolinian forests. And for climbers, this is the largest developed bouldering area in southern Ontario — hundreds of boulder “problems” scattered through the talus between the cliff and the river, in zones with colorful names like Wonderland and the Land of Oz.

A few things to know before you go. Getting in means descending (and later re-climbing) a sturdy metal staircase of about 80 steps into the gorge, so it's a real workout on the way out. The hiking trails are free to explore, but bouldering requires a permit from the Niagara Glen Nature Centre or the Butterfly Conservatory (with a signed waiver), so sort that out ahead of time if you plan to climb. Some boulders and areas are closed at times to protect the sensitive environment — always obey the posted signs, fencing, and Niagara Parks rules.

The Glen is gorgeous from spring through fall, with autumn colors a particular highlight. Wear sturdy shoes for the rocky, root-laced trails, bring water, stay well back from the powerful river, and pack out what you bring in. Whether you come to scramble the boulders or simply wander the forest above the whirlpool, Niagara Glen is one of Ontario's most rewarding outdoor gems.