One decision can travel farther than any one walk.

The walk begins at the place the treatment was worked out. Fred Hutch is where E. Donnall Thomas built the program that made marrow transplantation survivable, work that took a share of the 1990 Nobel Prize in Physiology or Medicine, and where a 1979 transplant from an unrelated donor gave one family the reason to start building a national registry. Jeana Moore starts there and walks north through Shoreline, Martha Lake and Everett. Four days to make one point: a person can join a registry long before any family knows they will be needed. The first Bone Marrow Awareness Day falls on day four, in Everett.

North of Everett the route leaves the city and opens into farm country — a rail junction at Marysville, the Stillaguamish valley at Arlington, the flat delta ground of southwestern Skagit County. The story here is accumulation: a day, a conversation and a considered decision at a time. Nothing dramatic happens on these roads. Someone slows down, asks why a woman is walking with a sign, and hears about a seven-month-old who needed a stranger. Day nine stops in Mount Vernon for the second Awareness Day.

Blanchard and Chuckanut Drive carry the route off the valley floor and onto the shoreline bluffs, then down into Bellingham and PeaceHealth St. Joseph — the first hospital on the walk after Fred Hutch. Its purpose is not to turn a hospital into scenery; it is to connect the long route with the people, research and care that make transplant possible. This is where a Whatcom County blood cancer starts: a blood draw, a biopsy, an appointment nobody was ready for. The transplant, if it comes to that, happens somewhere else — and closing the distance between those two buildings takes a stranger who joined a registry years earlier, on a day when nothing at all was wrong. Day thirteen stays in Bellingham for an Awareness Day before the last push to the border.

Custer, Blaine, and then the border. The Peace Arch makes the border visible as a point of connection, not a line that limits the mission. Jeana crosses it on foot, which is still a thing a person can do, and walks into British Columbia at Elgin. It is the natural moment to place the United States and Canadian registry handoffs side by side: the ask does not change when the address does. The registries differ, the eligibility rules differ, and the patient waiting on either side does not.

Through North Delta and Burnaby to Vancouver General Hospital on West 12th Avenue, where the bone marrow transplant programme serving adults across British Columbia and Yukon is based. The walk has no role inside the hospital; it passes on the public pavement outside. Two Awareness Days fall inside these five, the densest stretch of standing still on the whole route. That is deliberate. This is the most populous and most varied ground the walk covers, and HLA markers are inherited, so a registry can only offer patients the donors it actually holds.

West along the Fraser through Connaught Heights and Tilbury to Tsawwassen, and then the water. She rides as a foot passenger, and the miles on the water are not counted as walking. Sidney is where the island half of the walk begins, and where the route stops being a line up a coast and starts being a loop. It is a fitting place to remember that the transplant that started all of this was itself a crossing: the marrow that saved a seven-month-old in Washington State came from a man in Germany who had never heard her name.

Down the Saanich Peninsula through Royal Oak to Victoria, with an Awareness Day at each end of the leg. Victoria was once planned as the finish of this walk. It is not any more — it is the turn. From here the route stops going north and starts coming home the long way, down the far side of the water. Four days, two of them spent standing still and talking to whoever stops.

The second ferry carries the walk back across the Strait of Juan de Fuca to Port Angeles, and back into the United States on the water. Like the first crossing, the miles on the water are not counted as walking. Then east along the Olympic Peninsula through Carlsborg, Blyn and Discovery Bay to Quilcene — a rail-grade trail through second-growth forest, then the shoulder of US 101, six days of country where a woman walking alone with a sign is impossible to miss. Somebody always slows down. That is the entire reason for doing this on foot rather than from a desk.

Five days down the western shore of Hood Canal — Brinnon, Triton Cove, Lilliwaup, Potlatch. Mountains on one side, saltwater on the other, and one road between them. This is the quietest part of the route and the part where a person on foot is most visible. Someone pulls into a gravel turnout and asks what the sign is for, and gets the whole answer: a baby girl in Washington State needed marrow from someone outside her family, and a man in Germany had already joined a register more than a year before she was born. He had no idea she existed. He said yes anyway. Day forty stays on the canal for the ninth Awareness Day.

Shelton, Kamilche, Madrona Beach, and then the Washington State Capitol — forty-five days and about 337 miles after leaving Fred Hutch, and roughly forty miles from where it started, on the other side of an inland sea. The last day is not a walking day. It is the tenth Bone Marrow Awareness Day, spent in one place, talking. The finish is not the claim that one walk completed a registration; it is an invitation for each visitor to learn, decide and take a next step through an official registry.