St. John's has a limited number of options for outdoor activities, but what it does have is generally easy accessible and of an exceptional quality.
The main one for me is, of course, hiking. Raw nature is only ever a few minutes away. This is about a 20-minute walk from the heart of Water Street (and this portion of the trail allows mountain biking):
Quidi Vidi Trail by
R C, on Flickr
Within the city, the Grand Concourse is one of the most extensive urban trail systems in North America. It looks like a proper trail along rivers, streams, and lakes but includes lots of areas that are just sidewalk.
Within east driving distance of the city there are many other world-class hiking trails - most of them forming part of the East Coast Trail System but many others standing alone, like the Skerwink Trail or Gun Hill Trail.
It's my favourite outdoor activity, by far, and if you're brave it can easily be done here year-round with snowshoes or padded rubbers.
Brigus Lighthouse Hike by
R C, on Flickr
La Manche by
R C, on Flickr
The Spout by
R C, on Flickr
Tors Cove to Witless Bay by
R C, on Flickr
La Manche to Brigus South by
R C, on Flickr
The coastline is also excellent for rock climbing.
Torbay by
R C, on Flickr
Then there are more regimented activities - sea kayaking, whale watching, ziplining, camping (there's a campground in Pippy Park, right in centre city), cross-country skiiing, swimming (especially in freshwater lakes, including hilltop ones with gorgeous views of the city), berry-picking, hunting, foraging (herbs, mussels, etc.). A lot of these activities require weather conditions that are not common here - swimming, for example, you might only get two months of the year.
Snowmobiling is hit or miss. The snow cover often completely disappears several times over the course of our near-zero winters, so for that people generally drive well outside the city to the interior of the island.