Mercer Slough Environmental Education Center


Visit Mercer Slough

Located on a biologically diverse 320-acre wetland nature park in the heart of urban Bellevue, WA, Mercer Slough Environmental Education Center is a collaboration between the City of Bellevue and Pacific Science Center. To learn more about Mercer Slough Nature Park or adult and family programs offered by the City of Bellevue, stop by the Visitor Center and talk to a Park Ranger or visit



Mercer Slough Educational Programs

Mercer Slough Environmental Education Center - Kids & Early Learners Programs
Kids & Early Learners

From preschool to camps to Wild B’earthday parties, we offer engaging programming that will ignite your child’s curiosity in nature.

Mercer Slough Environmental Education Center - Teen Programs

Jumpstart your teen’s experience in environmental education with our innovative programs.

Mercer Slough Environmental Education Center - Family & Group Programs
Families & Groups

Looking for activities to do with your family or a large group to connect with nature? We have something for everyone.

Mercer Slough Environmental Education Center - Family & Group Programs
Teachers & School Groups

Plan your next field trip, classroom lessons, or check out our educator resources.



Mercer Slough Environmental Education Center

Mercer Slough
1625 118th Avenue SE
Bellevue, WA 98005

For more information about Mercer Slough, call (425) 450-0207.

To register for our programs, call (206) 443-2925.

Meet Our Staff

Elyssa Kerr – Educator
Since graduating from the University of Washington, Elyssa has spent her time performing restoration fieldwork along riparian corridors in King County with the Washington Conservation Corps, restoring dry land forest on the leeward slope of Haleakala with the Maui Forest Bird Recovery Project, and delivering interpretive education on the beaches of Puget Sound. She can often be found playing in the garden, looking for creatures on the beach at low tide or snuggling with her cat, Elon Meowsk.

Tayler Nichols – Educator
Tayler went to Oregon State University and received her B.S. in Biology with an emphasis on marine ecology. Following her passion for exploring nature and teaching, Tayler moved to the state of Washington in October 2016 (and has no plans to leave…ever). She enjoys hiking, eating, and playing with her dog Sadie and her tortoise Roomba.

Mary-Margaret Greene – Educator
Mary-Margaret earned a graduate certificate in environmental science and education at Teton Science School and a Master’s degree in environmental horticulture at the University of Washington. She’s taught outdoor education programs for six years in Louisiana, Wyoming and Washington with all age groups. In her free time, Mary-Margaret loves backpacking, hiking and all things plant related. At home, she likes to cook good food and watch good movies. She’s excited to be teaching outdoor programs at Mercer Slough.

Jenny Hughes – Educator
Jenny is a North Carolina to Washington transplant with a B.S. in Environmental Science from the University of North Carolina at Chapel Hill. He field study experience in NC, Mexico, Belize and the Galapagos Islands are a reflection of her inability to sit still in one place for very long. She loves all things furry, swimmy and slimy, and she’s always looking for suggestions for sweet spots to SCUBA dive or hike!

Olivia Astran – Educator
Olivia, a Southern California native, comes to Seattle via Boston and Minnesota. After receiving her B.A. in Biological Sciences with a minor in Music from Wellesley College, she went on to work at Cedar Creek Ecosystem Science Reserve in Minnesota on long-term ecology research. Most recently, she worked as an AmeriCorps volunteer with EarthCorps on a field crew, then as a second year Volunteer Specialist, leading volunteers in habitat restoration activities in Seattle. She enjoys hiking up mountains, swimming in alpine lakes, nerding out over plants, and supporting social justice causes.

Charity Villines – Lead Educator
Charity firmly believes that playing outdoors is an essential part of becoming a scientist and an environmental steward. She’s been playing outside in various capacities since she was a child building driftwood forts on Puget Sound beaches. Since earning her B.Sc. in biology and environmental studies, she has hooted at spotted owls in California, taught elementary schoolers in New Hampshire, built trails in Maine, and led volunteers in habitat restoration around Seattle. In the words of her hero, Mrs. Frizzle, life is best when you can “Take chances, make mistakes, and get messy!”

Ian Schooley – Teen Programs Supervisor
Ian grew up in the shadow of the Rocky Mountains where the Platte River cuts through the Colorado plateau, but the lack of salt water drove him to the Puget Sound. After a brief 10-year stint at the Seattle Art Museum his love of nature, being outdoors, and desire to help people connect with each other and  life around them lead him to pursue a certificate in Environment, Education and Community from IslandWood and Masters in Curriculum and Instruction from UW.

Leilani Nussman – Youth and Family Programs Eastside Supervisor
After childhood in Colorado, Leilani earned a Bachelor’s  in Biology from the University of Portland, a certificate in Education, Environment, and Community from IslandWood, and a Master’s in Science Education from UW. She believes that all students have a scientist inside them, and hands-on learning is the best way to draw that scientist out. Her favorite part of her job is taking children on their first camping or canoeing trip and hearing their stories about their favorite parts of camp. She hopes all campers leave Mercer Slough with a new appreciation for the natural world of the Puget Sound watershed.

Lisa Keith – Lead Educator
Lisa grew up near Olympia and spent her childhood playing in the woods, raising tadpoles and woolly bear caterpillars (separately, thank goodness) and exploring tide pools on Puget Sound. As a child, she wanted to be a ranger or a wildlife biologist, but got a little distracted. Years later, after an MA, work in hospice, a stint as a professional gardener, and a serious habit of science and naturalist volunteerism, it dawned on Lisa that becoming a science educator could allow her to pursue her childhood dream. These days, she’s exactly where she wants to be when she finally grows up: geeking out over macroinvertebrates and all things environmental science, and playing and learning in nature with kids of all ages.

Sandee Ditt – Weekend Educator
Sandee is a lifelong resident of Washington. She recently received a B.S. in Natural Resource Science from WSU. Growing up she spent a lot of childhood camping, reading and loving animals. In college, Sandee had the opportunity to work at the WSU Wild Ungulate Research Facility and to volunteer for the Department of Fish and Wildlife. Sandee worked as an Assistant Educator at Mercer Slough during the summer of 2013. She now works full time in Seattle in an office, but is glad to be spending her weekends outside back at Mercer Slough. In her free time, she can be found kayaking, hiking and exploring Western Washington.

Siri Nelson – Manager
Siri Nelson grew up in Seattle and has a B.S. from Evergreen State College and a M.S. in Biology from UW. Siri has a unique background as both an educator and scientist. Prior to becoming a teacher at MSEEC, she conducted research in the fields of ecology, conservation biology and biomedical genomics. At UW she was a National Science Foundation GK-12 OACIS fellow and co-taught high school ecology and biology classes, bringing novel research to local high school students. The coolest part of her job is mentoring young people interested in environmental science careers and connecting them with the greater science community. Siri loves getting outside any way she can and making all manner of stuff.

Caroline Cook – Early Childhood Education Coordinator
Caroline loves jumping in mud puddles, holding millipedes, and sharing her love of nature with early learners. She came to Mercer Slough from North Carolina, where she worked at an outdoor after-school program, taught elementary students about barrier island ecology, and led guided hikes in the Blue Ridge Mountains. She holds a Master’s degree in Environmental Studies from UNC Wilmington, and has worked at camps and environmental education centers for over 10 years.

Erica Calhoun – Early Childhood Lead Educator
Erica is excited for her fourth year at Mercer Slough, and second as an educator in Polliwog Preschool. After earning a BA in Environmental Studies at McGill University, she moved to Seattle and made a career of messy jobs in education, teaching a toddler art program at Seattle ReCreative and marine science lessons for Pacific Marine Research. She is excited to see our preschoolers learn and grow throughout the year- working at the wetland park is always a muddy, fun-filled adventure!

Chelsey Hottle – Educator
Chelsey comes to us from the east coast, where she earned her Bachelors of Earth Science Education from California University of Pennsylvania. She brings 6 years of middle school science teaching experience from Pennsylvania and New Jersey. She’s always had a love for nature and the outdoors and feels “in her element” in Washington where she enjoys fishing and hiking. Outdoor education at the Mercer Slough allows her to combine her love of teaching kids and being in nature!

Nathan Zabel – School Programs and Site Supervisor
While Nathan grew up in Minnesota, he always looked forward to vacations with his family, which took him to the mountains of the West. It was those vacations which led him to an appreciation of nature and a desire to educate others about the outdoors. He completed a degree in environmental education and interpretation from the University of Wisconsin – Stevens Point, which included summer jobs working for the U.S. Fish and Wildlife Service in Alaska. After graduating, he worked for a nature center in Wisconsin, where he developed and led education programs for all ages. Eventually, the mountains drew him to the Pacific Northwest, where he is excited to contribute to the education at Mercer Slough, while also enjoying the abundant hiking, backpacking, tidepooling, fishing and kayaking opportunities the Pacific Northwest provides.

Erica Duke – Educator
Erica started at the Mercer Slough teaching summer camps and is excited to continue teaching programs during the school year. She graduated from Bowling Green State University in Ohio and has taught outdoor education in many states, including Ohio, Florida, Massachusetts and Washington. In her free time, Erica likes to hike and participate in learning new activities.

Olivia Davis – Educator
Olivia started working at Mercer Slough for summer camps, and is excited to continue for the school year. She recently graduated from the University of Washington where she earned her B.S. in Biology. In her free time, Olivia loves hiking, birding, and reading. She also volunteers at the Seattle Aquarium and likes to hang out with the harbor seals!

Morgan Hefner – Educator
Morgan grew up in Delaware, and attended the college at the University of Maine at Machias. She graduated in the Spring of 2013 with a B.S. in Marine Biology and a minor in chemistry. Most recently, before starting at Mercer Slough, Morgan spent 6 months working in Dutch Harbor, Alaska and on the Bering Sea.

Kailyn Jasonowicz – Sales Representative
Kailyn is the brains behind registration at the Mercer Slough. She graduated from Michigan State University and moved out here after graduation. In her free time, Kailyn likes to be outside hiking, skiing and exploring, making food with friends and cuddling with dogs.



320-acre Wetland Park in the Heart of Urban Bellevue