WAMATYC does not run a conference (although we do financially support WCMC and WWCCSMC including sponsoring speakers at WCMC). So this page lists other organizations that are related to WAMATYC and/or host mathematics conferences in the northwest. In chronological order:

AMATYC: American Mathematical Association of Two-Year Colleges
WAMATYC’s parent organization hosts a major conference each fall.
45th annual AMATYC Conference, November 14–17, 2019, Milwaukee

NWMC: Northwest Mathematics Conference
58th annual NWMC Conference, October 10–12, 2019, Tacoma

Washington College Mathematics Conference
May 2–4, 2019, Ocean Shores [conference site]

ORMATYC: Oregon Mathematical Association of Two-Year Colleges
33nd annual ORMATYC Conference, April 25–27, 2019 at Inn at Spanish Head in Lincoln City on the Oregon coast

WWCCSMC - Western Washington Community College Student Mathematics Conference
13th annual WWCCSMC, Highline College, Feburary 23, 2019

PNWMAA: Pacific Northwest Section of the MAA
2019 Section Meeting, April 12–13, 2019, University of Portland

JMM: Joint Mathematics Meeting of the AMS and MAA
2019 Conference, January 16–19, 2019, Baltimore

MathFest - Mathematical Association of America
2018 MAA MathFest, 1-4 August 2018, Denver CO [2017 Conf Web]

NUMS - Northwest Undergraduate Mathematics Symposium
11th annual NUMS Symposium, 3 Nov. 2018, Willamette University, Salem OR

WS-AMS - Western Section of the AMS
Fall Western Sectional Meeting, 27-28 Oct. 2018, San Francisco State Univ. CA

WS-AMS - Western Section of the AMS
Spring Western Section Meeting, 14-15 April 2018, Portland State University, Portland OR