Mud Lake is adjacent to Brittania Park. There's quite a few walking trails in there... from www.canadascapital.gc.ca Mud Lake / Britannia Conservation Area A patch of wilderness in the middle of an urban setting, Mud Lake is an amazing area of forest and wetlands. Located in Ottawa’s west end, Mud Lake is home to hundreds of species of wildlife, with raccoons, frogs, turtles and foxes, to name but a few. This ecologically significant urban natural landscape is also prime birding territory, with thousands of birdwatchers coming each year to observe hundreds of different species. A walk through this easy-to-access urban jungle provides an exciting escape from city life. Location At the end of Cassels Street, along the Ottawa River Services Recreational pathway. You can find all the info you want on that website re: Mud Lake and Walking Trails.