It takes a great deal of volunteer effort to secure and maintain trails. This page lists web sites with information about trails in Salt Lake City or the Wasatch.
The Salt Lake Valley is currently undergoing a major effort to create green corridors and trail systems to connect the Salt Lake Valley. Major efforts include the Jordan River Walkway, the Bonneville Shoreline Trail, Dimple Dell and the proposed Parley's trail corridor.
You will find more information on recreation in the parks category.
Bonneville Shoreline Trail (www.bonnevilleshorelinetrail.org) - review The Bonneville Shoreline Trail is a ninety-mile long pedestrian and bicycle path which is being built across the foothills of the Wasatch Range along a route that follows the eastern shoreline of ancient Lake Bonneville.
SummitPost (www.summitpost.org) Summit Post includes descriptions of walks in the Wasatch and other ranges.
Protophoto - Trails (protophoto.com) Site includes photographs and descriptions of trails in Utah.
Utah Hikes (utahhikes.net) Site provides trail reports from Jim. The site documents about 8 hikes a year.