Ken's Lake, Utah - La Sal Mountain Loop Road Manti - La Sal, Utah National Forest access. Fishing, hiking, biking, four-wheeling, cross-country skiing. The scenic La Sal Mountain Loop Road (62 miles) crosses the western flank of the La Sal Mountains, Utah and beautiful Castle Valley, Utah and returns via Utah Highway SR 128 Scenic Byway to Highway US 191 just 2.5 miles north of downtown Moab. Utah Highway US 191 is southeastern Utahs main artery, interlinking beautifully sculpted canyons, breathtaking red rock formations, majestic snow-capped mountain peaks, rugged and colorful high desert beauty, geological treasures, mysterious prehistoric ruins and rock art, historic sites, a myriad of recreational opportunities and old-fashioned western hospitality.