Mestizo Hybridity — Tony Ortega. Firehouse Art Center, 667 4th Ave., Longmont, 303-651- 2787. Through Aug. 11.
Chief Niwot: Legend & Legacy. Boulder History Museum, 1206 Euclid Ave., Boulder, 303-449-3464. Through Nov. 25.
David Mayhew — Landscape photography. Boulder Arts and Crafts Gallery, 1421 Pearl St., Boulder, 303-443-3683. Through Sept. 2.
Elsewhere — Photos by Kevin Van Aelst. The Center for Fine Art Photography, Art Center of Fort Collins, 400 N. College Ave., 970-224- 1010. Through Aug. 25.
Feeling the Heat. The Muse Gallery, 356 Main St., Longmont, 303-678-7869. Through Aug. 25.
In the Courtyard, by Aliza Lelah; Industrial Heirloom, by Anne Mondro; Infotainment, by Evan Colbert; Past Lives, by Hilary DePolo Collective. Dairy Center for the Arts, 2590 Walnut St., Boulder, 303-440-7826. Artists’ talk at 4 p.m. Aug. 3.
Karen Barnett, painter, and Cheryl Pennington, hand-colored black and white photographs. The Old Gallery, 14863 Hwy 7, Allenspark, 303-747-2089. Opening reception at 5 p.m. Aug. 3.
Open for Design — A Denver Art Museum Community Challenge. Denver Art Museum, 100 W. 14th Ave., Denver, 720-865-5000. Aug. 4-Sept. 2.
Photography Workshops — At Rocky Mountain National Park. Free and open to the public. 800-925-2949, www.photographyintheparks. com. Aug. 5-11.
Visual Rhythm. Boulder Museum of Contemporary Art, 1750 13th St., Boulder, 303-443- 2122. Through Sept. 9.