Mobilene, with his Michigan Road pursuits, inspired me to pick up a project I set aside 15 years ago, to document the Pacific Highway along the Cowlitz Trail, as it was known to American pioneers, or the Cowlitz Portage as it was known to the trappers of the Hudson’s Bay Company (HBC).
The map below shows in orange the Cowlitz Trail or Portage between the head of navigation on the Cowlitz River and Olympia, Washington. The pink dotted line is the water route between the HBC’s Ft. Vancouver and Cowlitz Landing, where man and beast set off on foot through the forest and wetlands to the Puget Sound.

Over the Labor Day holiday and for some of the week before, I poured over maps, trail logs, and old periodicals from the state library to discover or rediscover what I could about the Trail. And thanks to the BLM for reposting the 1850’s plat maps. I used them as overlays on Google Earth to provide the detailed path of the old trail. I have now done the entire trail from Cowlitz Landing to Olympia on the road and on the old maps.
The maps below show a sample section of the Trail (yellow line) and old US 99 (Pacific Highway). Using a photo editing program, I converted the plat maps to the blue overlay, highlighted the Trail in yellow, and used Earth Points to carefully match townships and sections. The results were both satisfying and exciting. In case you care to match images, I added a coordinate at the yellow pin for reference.


I was amazed at how closely the route of the old Pacific Highway followed the trappers trail (yellow line), virtually on top of it in many, many cases, and always very near. And it brought a whole new appreciation of my home area, seeing the connection between sites today and in 1853 or there about. I may have even discovered a previously unrecognized section of the trail just a few feet from old 99! And I may have located the first concrete section of old 99, at least in Washington. More of all that later.
If I stay as true to the task as Jim (Mobilene), we will travel south from the Puget Sound to Cowlitz Landing, following old 99, and its relationship with the trappers’ and pioneers’ Cowlitz Trail over the next few weeks.
Keep the Show on the Road!
Dave





























