When I spotted this painting resting in a bin, I snagged it immediately because I liked the style, subject matter and composition. A quick google told that the artist is Ben Nelson, aka Ahn Hia Ohm.
Untitled* 4" x 7" Original Watercolor - 1993
*I could not find a title for this watercolor, but other paintings have titles like An Honorable Return, Encounter, and They Return Singing and a possible title for this would be Kiowa Horseback Riders. I have found similar paintings that have sold at auction for several hundred dollars.
Here is the AI Summary of Ben Nelson's Art:
Ben Nelson, also known as Ahn Hia Ohm, meaning He Knows, is a contemporary Native American artist of Kiowa, Navajo, Taos Pueblo, and Delaware descent, born in 1982. His intricate, self-taught watercolors are inspired by his Kiowa heritage and often depict scenes of historical and active Native American life, including dances, hunts, and horsemen, in a ledger-style format. He began painting as a child prodigy, winning awards at Indian Market, and his work has been featured on the cover of Indian Arts magazine.
Read about his journey from Ben Nelson to Ahn Hia Ohm to A-The Son of Picasso at this link