Updated February 20 Hiking a planned community in Lake Oswego might sound about as thrilling as watching paint dry while walking on a low-impact treadmill. But the suburb s Mountain Park neighborhood is hiding an entire trail system worth exploring. Dubbed Nature s Neighborhood, Mountain Park is the largest planned community in Oregon and was designed in such a way that the area s natural environment would be preserved as much as possible during development, which includes miles of walking trails. It s the brainchild of landscape designer Carl Halvorson, who, in the 1960s, envisioned a suburban utopia with recreational facilities, greenways, open spaces, public art and natural areas. (He also had plans to build a European-style shopping center that never got off the ground.) The idea was to limit the need for sidewalks and take pedestrians and cyclists off the roadway.