Mount Pierrway is a mountain in east-central British Columbia, Canada, located near the headwaters of the Clearwater River.

[1] Mount Pierrway was first climbed on August 13, 1969 by Art Maki and Art Wilder, "from camp east of the Park boundary, via East Pierrway Glacier, up highly crevassed glacier to col, then climbed north summit and followed ridge to the extreme south end which is the highest summit."

The second ascent was achieved on May 19, 1987 by a British Columbia Mountaineering Club ski party consisting of Brian Gavin, Malcolm MacFadyen, Colin Oloman, Mary Prendergast, Brian Thompson, Gavin Thurston, and Ross Wyborn.

The third ascent was by Bill McKenzie and Roger Wallis from the Alpine Club of Canada, on August 17, 2005.

The Park's highest unclimbed mountain is 3.7 km (2.3 mi) WSW of Pierrway, elevation 2,847 m (9,341 ft), and is unnamed.