Sunday, February 1, 2026

Journey Home, the Trench, Fraser River, West of the Stratit Creek-Fraser River Fault

 I previously noted the Rocky Mountain Trench while returning home from a previous trip this past year (rocky-mountain-trench-rivers). With fog in the Trench and the valleys and snow on covering the high ground above tree line the view was enhanced as I flew over the Trench.

Upper Fraser River in front of engine flowing towards the Trench. 
The Fraser flows north along the Trench towards the top of the picture

The Trench with the fog shrouded Canoe River in front of engine.
The Canoe River flows within the Trench south towards the lower left in the image. 
The lower Canoe River is now a lake as a result of the Mica Dam on the Columbia.
The foggy valley past the trench include the Canoe River, but further to the west (left) is the Thompson River. I am crossing Thompson's path again on this trip (crossing-david-thompsons-early-days).
Getting a sense of the scale of the Trench

The Fraser River flows north along the Trench, but then leaves the Trench and turns to the south.

The Freaser River canyon cutting through the BC Coast Range.
The canyon through the Coast Range follows the strike of the Straight Creek-Fraser River Fault. 
The fault is a north-south fault strike slip fault with the area west of the fault offset to the north. The fault cuts through the North Cascades of Washington and the BC Coast Range. The fault was active during the Eocene. 

BC Coast Range west of the fault. Harrison Lake is on the upper left. During a diffrent geologic work era I had numerous ventures into the area and was fun picking out the various valleys and ridges from that time.

After landing, I took the sky train into downtown Vancouver and did a walk about the urban core through the downtown area, Gas Town, the abrupt change to the east with people having a hard life to China Town. 

On the train through Burnaby I observed thousands of crows over several miles flocking towards their night roosts. They are Commuter Crows.

Crows just west of Burnaby

Crossing the Fraser at New Westminster with a view of the sky train bridge

The train stops at the border at Blaine for inspection.