Styloid Peak is the unofficial name of a mountain summit located in North Cascades National Park in Skagit County of Washington state. Its nearest higher peak is Mantis Peak, to the west, and Snowfield Peak rises to the west. Precipitation runoff from Styloid Peak drains into Neve Creek and McAllister Creek, both tributaries of Thunder Creek. The first ascent of Styloid Peak was made on May 31, 1981, by John Roper and party, on the same day that they climbed Distal Phalanx. Roper, being a doctor, named some of his many first ascents for anatomical parts of the body.