Current and Upcoming Exhibits

La forma del passaggio or The Shape of Passage

Migrazione/Migration is an exhibit with sister city Seattle and Perugini artists at Museo Civico di Palazzo della Penna in Perugia, Italy

September 3rd to October 9th  

Exhibition featuring Ghost Timbre and accompanying media at Jack Straw Cultural Center, 4261 Roosevelt Way NE, Seattle, WA.

July 8 – September 23

Opening reception 7:00 – 8:30 pm July 8, 2022. Visits by appointment only: Monday – Friday 10:00 am – 5:30 pm. Call to schedule: 206-634-0919 for the opening reception and following visits.


Sound the Siren

Residency & Exhibit at Bellevue College Gallery Fall 2022

New Public Art Contract: Emerge– 2024

This Entry Sculpture which transforms from a column into a tree will be at Piper in Redmond, near Marymoor Park.

<Past Exhibits

Silent Salinity

Saturday Dates added!

November 20, 27 and December 4th, 2021 11am-7pm. Join us!

A new chapter of Silent Salinity opens Saturday November 13, 2021. Join us At Enter/Return:Allusive Constructions, a pop up Gallery by Tommy Gregory and Casey Arguelles Gregory in Columbia City. Reception Saturday 4-7 at 4860 Rainier Ave S. 

Current and Upcoming Exhibitions

Through December 5th Silent Salinity returns at Enter/Return: Allusive Structures

Coming in 2022

I’m excited to announce two solo shows in 2022

I’ll be celebrating Women’s History Month in March by installing my feminist artwork in the exhibit Sound the Siren at Vashon Center for the Arts. This will be the first time all of my bronze work with an underlying feminist theme will be exhibited at once. More neon too! March 4-27, Artist Reception March 4th, 2022 5-8pm

Also! at Vashon Center for the Arts: My daughter Roxy Coss and I will be doing a Talk on the Rock Thursday evening, March 10th: A Cross Generational Talk on the Creative Process In this debut public exchange, we will discuss our individual and collaborative explorations through the creative process, and examine similarities and differences of how we each transform conceptual ideas of inspiration into finished art.

The Beautiful Bellevue College Gallery re-opens in 2022 after closure due to the pandemic. My exhibit Witness will open in late September as school opens. Sept-Nov 2022

Like Mother tours to the White River Valley Museum in Auburn. This thoughtful group show explores Mother Daughter relationships through the work of artists.

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Like Mother at Vashon Center for the Arts

Traces is a story of life, lineage, & loss. Starting with my daughters, this work traces my female lineage and gives voice to the lost identities of my foremothers. Covering more than 175 linear feet, the maiden names spiral backwards. Each name lost in marriage are honored here as in a family journal. The shadows cast, like the names themselves are ethereal. Like chasing shadows, or chasing ghosts, each name is but the name of a father.
Traces 2021; steel;  48”x48”x4″. Sold

Here is a 3D virtual tour of the Like Mother exhibit at the Vashon Center for the Arts curated by Kelly Lyles.

Witness at Aljoya Thornton Place through May 8

I’m using the hat as a period icon to examine the female experience in the 20th century to speak to the 21st century. I’ve been interviewing Elderly women at Aljoya Thornton whose timeless stories resonate today. They are featured in Witness on exhibit at the Residence Gallery. These women have seen so much change yet in other ways so little. Thanks 4culture for an Artist Project Grant for this work and to curator Anna Macrae for coordinating.

upcoming exhibition

Ghost Timbre, Jack Straw Cultural Center Seattle, 2021

Timbre/Timber, a Podcast with Alma Mater, Tacoma, WA 2021

Ghost Timbre and Ghost Log Public Art Installations Dedication spring 2021

WSAC Art Commission Surge at Bainbridge Island High School, June 2021

Treasure Stone, KCHA Public Art Commission, White Center, WA May 2021

Secrets and Other Stories, 21st Annual Arts in Nature Festival, Seattle, June 20-21, 2020. cancelled due to Covid

Guest Artist: Conversations

Opening November 7th

Taking off the Gloves

J. Rinehart Gallery presents an exhibition of artwork in conversation. Featuring new works by Jaq Chartier, Katy Stone, Maggie Jiang, and guest artists Hernan Paganini and Mary Coss. On View in the gallery from November 7 – December 19, 2020.

Stay tuned! I’ll be taking part in the upcoming live-streamed Conversations.

“With a unique mix of materials, imagery and techniques, this exhibition combines the works of seemingly different artists in the same visual space, creating a new conversation between the works and the viewer as they interact.

Mary Coss’ bronze gloves paired with Meggan Joy’s digitally collaged floral hand gestures speaks to feminine ideals and modern strength within the rich symbolic nature of our hands. Joy’s fleeting floral collages flow into Katy Stone’s works on aluminium as her silhouettes of flora dance off the wall.”

Bainbridge Island Museum of Art

Groundswell exhibiting in “Departures and Arrivals” June 29-October 6, 2019
A group exhibit at Bainbridge Island Museum of Art
photo detail Ian Lewis.

“BIMA offers an “intense session in art vocabulary” with this group exhibition focusing on the artists’ idiosyncratic approaches to abstraction. The roster is intriguing, ranging from textile artist Jono Vaughan to ecologically focused Mary Coss to UW professor and painter Denzil Hurley.” The Stranger recommended

Silent Salinity: after the dig. 950 Gallery

Artifacts from the ruins What Remains have been catalogued and are now on view at 950

January 10 – February 21, 2019. Art and science meld in salt encrusted artifacts, a dystopian landscape, poetics of language and video projection in the new exhibit at 950Gallery in Tacoma. 

“I use the language of metaphor to examine contemporary issues. Silent Salinity explores the relationship between water, global warming and culture. Through a two-year partnership with spatial ecologist Roger Fuller, I examined the dangerously increased salinity levels encroaching on local estuaries, and on consequently our freshwater re-sources. The work in this show is inspired by these conversations and resulted in telling the story symbolically through the medium of salt.” 

Art + Sci Salon : Mary Coss & Roger Fuller
February 7, 6 – 8PM at the Tacoma Art Museum

Surge at Museum of Northwest Art

Surge     October 6, 2018-January 6, 2019    ​

Artist/Scientist Panel January 5

Cohost: Skagit Climate Science Consortium  and  Museum of Northwest Art

Artists and Scientists collaborate on Artwork about Global Warming.  Surge, an exhibition designed to draw attention to climate change and its impact on Northwest’s coastal communities, provides the forum for artists together with environmental researchers and educators to present the public with new perspectives on issues such as flooding, sea level rise and storm surge.

Working in partnership with Eco Scientist Roger Fuller, we’ve explored the effect of Climate Change on Salinity Levels in local estuaries, and consequently the impact on the flora and fauna.  I am exhibiting three installations in this show that tell this story through the medium of salt. Roger and I will be part of an artist panel to discuss the collaborations, the science and the art. 

Artist Scientist Panel  Saturday, January 5, 2019 at 3:30 PM – 5 PM

Museum of Northwest Art 121 1st St, La Conner, Washington 98257.

TENACIOUS  August/September 2018 SUZANNE ZAHR GALLERY  Mercer Island Contemporary artists featuring  interpretations of “the feminine.”

Shift Invitational Exhibit  Aug 2-25  w/ Ed McCarthy 312 S Washington St.  First Thursday opening August 2



LIKE MOTHER (like Daughter) Aljoya Thornton Place  June 2-Sept 9, 2018



Boxed In


San Francisco curated by Kirk Stoller

“Wording” features the work of artists who combine fragments of written language with the potentials of visual experience.  By creating a dialog of work by Seattle based artist Mary Coss, NYC based artist Soledad Arias, NYC based artist Maria Vasconcelos, Bay Area artists Maria Porges and the late Susan O’Malley, “wording” hopes to offer a touch of antidote to the cynicism, suspicion, and numbness caused by this overwhelming circumstance.

Nevertheless, We Persist

For Margaret Sangers FaithAn exhibit about Reproductive Freedom  February 21-April 1.   Columbia City Gallery  Opening Artist Reception Saturday, February 24th from 5-7pm

NARAL Event and Meet the Artists   Sunday, March 18th from 5-7pm

Over 100 years ago, Margaret Sanger created an organization that went on to be Planned Parenthood.  She believed that “No woman can call herself free who does not own and control her body.” Nine artists come together to explore the issue of reproductive freedom and its impact not only on individual women but on our nation.

Artists: Holly Ballard Martz, Ellen Berdinner, Sandi Bransford, Louise Britton, Mary Coss, Rosalie Frankel, Laurie Fronek, Sandi Goldstein, Ellen Hochberg, and Terra Holcomb


Community Art Show at Tacoma Art Museum

Like Mother, Like Daughter
January 10, 2018 – March 29, 2018
Opening Reception: March 15, 2018 from 5-7:30pm

Taken from the phrase “like mother, like daughter,” this group show features 22 multi-disciplinary artworks created by women in tribute to our moms (and mothers everywhere). Our moms were jet-setters, ballerinas, writers, debutantes, scientists, pioneers, etc. Some survived wars, mental-illness, racism – their stories are as fascinating as the art they inspired. The artist-daughters in this show share visual and written stories, deeply considering the personal yet universal themes about one of the most beautiful and complex relationships – mother to daughter.

Traces (detail above) is a story of cultural inheritance, life, lineage, & loss. This work gives voice to the lost identities of my foremothers. The maiden names of my ancestors, each lost in marriage and gone before its time, is honored here as in a family journal. Their shadows, like the names themselves are ethereal. Like chasing shadows, or chasing ghosts, each name is but the name of a father.Traces is a story of cultural inheritance, life, lineage, & loss. This work gives voice to the lost identities of my foremothers. The maiden names of my ancestors, each lost in marriage and gone before its time, is honored here as in a family journal. Their shadows, like the names themselves are ethereal. Like chasing shadows, or chasing ghosts, each name is but the name of a father.   1701 Pacific Ave Tacoma, WA