I hiked across Switzerland with convertible pants... or as my stepdaughter calls them, "the shants that I can't be in the same room with". These are the ones I got:

https://www.amazon.com/gp/product/B07SHCMX96

Costco also has some around this time of year that are much less expensive, but the ones I linked to (MEIR) are much lighter and comfortable (they stretch). I sprayed them to make them water resistant, and really just loved them all the way along my trip.

My only complaint is in the sizing. They only go by waist size, so they come up a little short on me (as a tall/thin guy).