The phrase "a pathway down" is correct and usable in written English.
It can be used to describe a route or direction leading to a lower area or level, often in a physical or metaphorical sense.
Example: "The hikers followed a pathway down to the riverbank, enjoying the scenic views along the way."
Alternatives: "a route downward" or "a trail leading down".
The biggest of these also attaches to a neighboring viaduct, inviting pedestrians to utilize the building as a pathway down to the park.
"Without an understanding of that trauma, of that pain, it's really hard for kids to be able to let go of it or be able to map a pathway down a positive direction," he said.
As she moved to continue on her stroll, she pointed me to a pathway down to the beach.
Make a pathway down the middle of the area to be cleared first, so you have a clear surface to walk on.
Also, the cAMP-protein kinase A signalling pathway down-regulates the activity of the partially redundant transcription factors, Msn2 and Msn4, which contribute to the core stress response that helps to protect S. cerevisiae against oxidative stress.
On the other hand, the G2/M block did not cause apoptosis by itself but seemed to need a functional mitochondria-mediated caspase pathway down-stream.
Entry point into the TCA pathway Down-regulation.
With recent polls showing the Democratic presidential nominee losing the confidence of voters under 30, and more than one in three planning to vote for a third-party candidate, Clinton offered students a pathway to paying down college debt in return for public service.
A 10-minute drive from Ponta Delgada along the south coast to Relva is Miradouro da Fonte da Rocha ("viewpoint of the rock source"), and a pathway winds down a steep cliff.
From the front a slate pathway leads down a gently sloped yard, across a narrow, quiet road and a set of Amtrak tracks to a public boat landing and a small park with picnic tables.
Most of these metabolites fell in a pathway characterized by down-regulated glutamate synthesis and disturbed Krebs cycle.
