I am 6 years old and I have found almost 50 geocaches but this is my first hide. It is a cache inside of a cache. Bring your own pen and good shoes. It's easy and hard to find. For some new geocachers it might be hard but for more experienced geocachers it would be easier. It's a little hard to get to. I hope you have a good time looking for this cache.
From my mom: Before this site became Martha Washington Park it was a girl's school for wards of the Juvenile Court of King County (1921-1965). Girls 16 and older were often "sentenced" to to this residential school and were required to spend several hours a day doing work such as cooking and cleaning in addition to attending classes. They were only allowed family visitors twice a month (https://www.historylink.org/File/10556). Between 35-80+ girls were housed here at various times along with teachers. After the residential school closed the site was briefly used as an alternative school before the site was sold to the city. The dormitory buildings were demolished in 1989 though remnants of the driveway remain.
https://friendsofmarthawashingtonpark.org/History_files/washington,martha.pdf
Before this, the xachua’bsh (or Lake People/People of the Lake), a sub-group of the Duwamish, lived near here. The Duwamish name for this place is believed to have been Xaxao’Ltc - translated as "Taboo" or "Forbidden" Container/Place. Some speculate the name comes from the mystery of bubbling waters that appeared off the shoreline (probably before the water level dropped when the Ballard locks were built.) Source: https://friendsofmarthawashingtonpark.org/History.html
Today, Martha Washington Park has been used as a landing site for Tribal Canoe Journey (https://en.wikipedia.org/wiki/Tribal_Canoe_Journeys) - an event where indigenous peoples of the Pacific Northwest travel in ocean-going canoes to visit Native Nations on route to their final destination (each year a different tribe hosts). (https://www.facebook.com/OfficalTribalJourneys) A friend of ours is part of a group of volunteers that has helped restore some land in Martha Washington park, planting a demonstration garden with flora that was likely part of the original ecosystem, including camas - a beautiful indigo flower whose roots were used as a food source by native peoples. If you come here in the spring, you'll see the gorgeous spikes of flowers under one of the white oaks in the park. Read more here: https://friendsofmarthawashingtonpark.org/Demo_Garden.html
Additional info added since there have been a lot of DNF's: Look for an informal path. You don't need to go all the way to the water. Enjoy the search!