thumb|250px|kolob arch thumb|250px|kolob arch  kolob arch is a natural arch in zion national park, utah. the natural arch and bridge society considers kolob arch to be the second longest natural arch in the world. in 2006, the society measured the span at 287.4 Â± 2 feet (87.6 m),wilbur, jay h., "the dimensions of kolob arch," natural arch and bridge society, retrieved 2007-01-04 which is slightly shorter than the landscape arch in arches national park. differences in measuring technique or definitions could produce slightly different results and change this ranking. kolob arch can be reached via one of two hiking trails, either of which is seven miles (11&nbsp;km) long and results in a round trip of fourteen miles (22&nbsp;km). the arch can also be reached from ice box canyon, a canyoneering route in this section of zion national park. the arch is set close to a cliffside that it frames. ==references== ==external links== *natural arch and bridge society article *kolob information about kolob arch, kolob canyons and kolob terrace. 
Landforms_of_Washington_County,_Utah Natural_arches_of_Utah Zion_National_Park