Grand Mound is simultaneously a geological phenomenon, a census-designated place, an urban growth area, a black dot on the map, and a place whose name sounds like it was chosen by a committee that gave up after spotting a hill.
It has a fire station, an elementary school, a cemetery, and more than 3,000 residents. But despite its best efforts to feel like a proper town, Grand Mound lacks a city council, a police department, or articles of incorporation. It is not a town. It does, however, have one very large, lovely, and mysterious mound.
Last week, I spent an afternoon walking the full perimeter of this geographic anomaly, chatting with residents, and putting the pieces together.
Ice
Geologists call it a glacial kame. That's a giant pile of rocks and debris left here about 17,000 years ago during the tail-end of the last ice age.
To put the last ice age into perspective, think of it as an empire with an army and a last battle. The "empire" was a wall of ice ranging from 1 to 2 miles in thickness called the Cordilleran sheet. The "army" was the Puget Lobe, the ice that squirted in between the little gap between the Cascades and Olympics. The "last battle" was the Vashon Stade, the years when the glacier was losing and began retreating north.
Geologists believe that as this frozen regiment stalled, a long vertical hole or "moulin" opened up in the stagnant ice sheet. This was one of the first spots in the region to see daylight after thousands of years beneath the ice. Meltwater poured down the sides of the hole in long waterfalls. It deposited huge amounts of rocks, sand and gravel. When the surrounding ice fully melted away, it left behind a steep-sided, isolated hill of debris, a major geologic oddity, a lonely sentinel in an otherwise very flat landscape, a mound. A grand one.
As the ice age wrapped up, larger rocks were deposited closer to Tenino and meltwater sent fine sand to the areas south of it. That sand plays a big role. Sandy soil helps maintain the prairie that today covers large portions of south county.
Indigenous history
The Chehalis people, the S'Gwal'ish or "People of the Sands," take their name from that same sand, which is found on the many bars and banks along the Chehalis River. The oral history of the Chehalis links their presence on the land — and the creation of Grand Mound itself — to a celestial event. The story is remarkable because it functions as both an origin story and an explanation for why this strange hill exists at all.
According to legend, the Grand Mound is not just a hill; it is the physical remains of a celestial being. The story tells of a star that fell from the sky and landed on the prairie. Too large and powerful to remain fully in the physical world, it eventually departed, leaving behind a piece of itself. That small remnant is the Grand Mound.
I couldn't help noticing that both the geological explanation and the Chehalis account imagine Grand Mound being created by something descending from above.
Traditional stories mention that a sacred spring once flowed halfway up the side of the mound, marking its divine origin. In the Salish worldview, there was a time "before the floods" (an era that aligns interestingly with the end of the last ice age) when humans, animals, and celestial beings were more closely intertwined.
Legend holds that after a great flood, a figure known as Moon the Transformer (Xwan) changed the world, giving humans their distinct languages and roles. The Chehalis view themselves as descendants of the beings who inhabited the land during these transformative times. Because their physical and spiritual identity is so tied to the Mound, which they believe came from the stars, there is a deep-rooted sense that their lineage is connected to celestial beings who first interacted with the Earth at that spot.
Long before settlers arrived, anyone standing atop the mound could see across miles of open prairie.
In 2014, the Chehalis Tribe purchased the mound.
Pioneer survival
There's some debate over which settler founded Grand Mound and named it. Some say it was Leonard Durgin, who initially named it Mound Prairie and built the first house on top of it. Others say it was Jotham Weeks Goodell. Others say it was Samuel James.
One thing is certain. The mound wasn't just a sight to see; it was a strategic asset. During the Puget Sound "Indian Wars" (1855–56), Charles James, the son of Samuel James, built Fort Henness, a stockade nearby. The mound almost certainly made the location attractive because it provided a high point for signaling and scouting.
During the 1860s, the settlers at Fort Henness (near the base of the mound) continued to use the top of the Grand Mound for signal fires. In an era before telegraph or phones, a large fire on top of a 125-foot hill in the middle of a flat prairie could be seen for nearly 20 miles, acting as an emergency beacon for other settlements in Chehalis Valley.
During this era, the mound was described as being "thickly studded" with smaller Mima mounds at its base. Today, most of those smaller mounds have been flattened for agriculture and development, leaving the Grand Mound standing alone.
At the turn of the century, long before the Great Wolf Lodge arrived, the Grand Mound was a premier picnic destination. It was common for families to climb to the summit for Sunday outings. There are historical accounts of pioneers carving their names into the trees at the top — the Victorian version of an Instagram geotag.
The mound was topped by a single, massive lone pine that served as a navigational landmark for travelers on the Oregon Trail. While that specific tree is long gone, it was once used by wagon trains as a north star on the horizon to ensure they were staying on the correct path toward the Puget Sound.
Modern era
The mound is made of loose glacial gravel, which drains water faster than the flat prairie floor. Over the last hundred years, this has allowed Douglas firs and other trees to take root and survive above the seasonally saturated soils of the prairie floor, creating a dark island of trees in a golden sea of grass.
Because the Grand Mound Cemetery is located at the foot of the mound, there is a long-standing local myth that the mound itself is a giant "Indian Burial Mound." While the Chehalis people certainly lived there, geologists regard the mound as a natural glacial formation rather than a constructed burial heap. The cemetery was likely located nearby because the soil was well-drained and the view of Mount Rainier is spectacular.
The mound is a 125-foot pile of high-quality construction material. In the mid-20th century, there were several discussions about excavating it for road base and concrete. Fortunately, its status as a historical landmark and the presence of the cemetery helped keep prospective gravel miners at bay, preserving the silhouette of the hill.
Because the mound sits in the path of the "Chehalis Gap" (where wind pushes through from the coast toward the Cascades), it can actually cause a tiny bit of orographic lift. On foggy mornings, you'll sometimes see a cap of mist clinging specifically to the trees on the Grand Mound while the rest of the prairie is clear — making it look like a tiny, smoking volcano.
Today, the mound still draws the eye. Just not as reliably as it once did. Now the area's most visible landmark isn't the mound at all. It's the brightly colored waterslides of Great Wolf Lodge.
There is something wonderfully Grand Mound about that. For 17,000 years, the largest thing around was a pile of gravel left behind by a retreating glacier. Then a sovereign tribe partnered with two private-equity firms — including Blackstone, the world's largest landlord — to build a 56,000-square-foot indoor water park next to it.
One landmark was created by meltwater pouring through a hole in a glacier. The other was created by lawyers, financiers, architects, and several million gallons of chlorinated water.
Both are visible from Interstate 5.
But the mound got here first.
While out in the field researching south county history, David Scherer Water encountered something entirely new: a surprising number of people who recognized him as a JOLT columnist. While his ego certainly appreciated the recognition, what he valued even more was that people seemed to find it easier to approach him and share stories. If you're holding back, stop. David is our friendliest columnist. Send him an email (david@thejoltnews.com) and support his local history work by becoming a paid or free subscriber to his Substack.
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JustSaying
This was a great article. Lots of good information. Thanks!
Wednesday, July 1 Report this
wildnature
Your articles David, are the best part of Jolt! Which is a great local newsletter.
Thursday, July 2 Report this
Snevets
Thank you for sharing. What a view of Mt. Tahoma!
Thursday, July 2 Report this
Daisylee
In 1852, my family...Samuel James arrived at Grand Mound and our family settled this area. And...by the way...don't I remember you at KAOS? I had a show there also and worked in the bookstore for 25 years. Thanks for your column!
Wendy Olympia TESC 2001
Thursday, July 2 Report this
AliceV
Good read!
Thursday, July 2 Report this
BettyVerdammt
David, this does nothing to resolve the Mounds vs. Almond Joy dispute that has so riven our people.
Sunday, July 5 Report this
OlympiaThrowaway
Hey David,
Loved the article. I grew up on the Henness Prairie. I have some family buried in the Grand Mound Cemetery, across from the Fort Henness roadside monument, which (I think) is what you have a photo of above.
I think there might be a Grand-Mound-sized inaccuracy, however. The actual Grand Mound is nowhere near Henness Prairie, or the Grand Mound Cemetery. It is next to Old Highway 9 (as is accurately described in the 5th photo of your story). According to my sixth-grade teacher, Kitty Smith (RIP and I'm sorry I tried to play Prince's "Darling Nikki" at our dance), road crews had to cut into the Mound to build Old Highway 9, and now you can see the exposed granite from the road. This is near Old Highway 9's intersection with James Road, also near the old Maple Lane School. It is miles away from the Grand Mound Cemetery.
Regardless, I was delighted to read about my hometown, and too see photos of the camas. Thank you for the piece!
Friday, July 17 Report this