The 29th annual Canyonlands Half Marathon, which runs along the Colorado River on Highway 128 and into Moab.Runners waiting on red rock for the start of the Canyonlands Half Marathon in MoabRunners waiting on red rock for the start of the Canyonlands Half Marathon in MoabRunners waiting on red rock for the start of the Canyonlands Half Marathon in MoabRunners waiting on red rock for the start of the Canyonlands Half Marathon in MoabRunners waiting on red rock for the start of the Canyonlands Half Marathon in MoabPeople waiting for the start on the red rock. Moab - The 29th annual Canyonlands Half Marathon, which runs along the Colorado River on Highway 128 and into Moab.