The Hanging Lake Tunnel is a dual bore highway tunnel carrying Interstate 70 (I-70) and U.S. Highway 6 (US 6) through the southern wall of Glenwood Canyon, just east of exit 125 in Garfield County, Colorado, USA. The tunnel is named for Hanging Lake, which resides in a side canyon to Glenwood Canyon and is accessible via a trail head at a rest area near the western portal of the tunnel.