The Minneapolis Skyway System is an interlinked collection of enclosed pedestrian footbridges that connect various buildings in 80 full city blocks over 9.5 miles (15.3 km) of Downtown Minneapolis, enabling people to walk in climate-controlled comfort year-round. The skyways are owned by individual buildings in Minneapolis, and as such they do not have uniform opening and closing times. The 9.5 miles of skyway are comparable to the Houston tunnel system, the systems in Canadian cities such as Toronto's PATH, Montreal's Underground City, Calgary's 11-mile Plus 15 system and the 8-mile Edmonton Pedway system.