Refer to the directions to Bulwark Arch and note the sentence, "Climb down
to the base of the entrada sandstone and follow the canyon rim left until
you get to the Arch". To get to Protractor Arch, instead of following the
canyon rim to the left, go right instead to the arch at UTM Zone 12 0682258E
4331706N.. The arch has a span of 22 ft..