Missouri Secondary State Route H is a north-south highway in North-Central Crawford County. It runs from the Onondaga State Park, north of Interstate 44, north of Leasburg. MO Sec St Rt H passes through the following towns in Crawford County. Crossroads Leasburg MO Sec St Rt H is not multi-plexed in Crawford County. MO Sec St Rt H intersects the following highways in Crawford County. Missouri Secondary State Route MM, near Leasburg. Interstate 44, near Leasburg.