This beautiful example is:
“Spring Thaw, Rocky Mountain Park” by
More from PAPA here.
En plein air (French pronunciation: [ɑ̃ plɛn ɛːʁ]), or plein air painting, is a phrase borrowed from the French equivalent meaning “open (in full) air”. It is particularly used to describe the act of painting outdoors, also called French: peinture sur le motif (“painting of the object(s) or what the eye actually sees”), where a painter reproduces the actual visual conditions seen at the time of the painting. This method contrasts with studio painting or academic rules; those might create a predetermined look. En plein air can also be used to describe other activities where a person partakes in an outdoor environment. (wiki)
Lorenzo Chavez’s site is here.