“Roots,” Colorado’s largest chalk mural, was created over six days as a Biennial of the Americas tie-in at Macy Dorf’s Artists on Santa Fe Gallery, 747 Santa Fe Drive in the Arts District. Denver artist David Ocelotl Garcia designed the colorful work, which covers the entire facade of the early 20th century two-story building and wraps the corners. Starting with a graphite sketch, a pigment base was applied next, followed by working the design with chalk, assisted by gallery artists. A fixative was applied to lengthen the time it would stay, but it is temporary, hopefully lasting through July.

“Roots” combines images of the artist’s community with the roots of the building and the support of the arts. Gallery hours: 10 a.m. to 5 p.m. Mondays through Fridays; 10 a.m. to 4 p.m. Saturdays. 303-573-5903, www.artistsonsantafe.com. (Dorf’s ceramic art is featured at the Littleton Museum’s Two Potters retrospective show).

Swallow Hill Music holds its first Woody Guthrie Festival July 30 and 31. On Friday, performers at Swallow Hill Music, 71 E Yale Ave., Denver, will include Guthrie’s great granddaughter Sarah Lee Guthrie and Johnny Iron plus Pete Seeger’s grandson Tao Seeger. On Saturday, music will move to L2 Arts and Culture Center, 1477 Columbine St., Denver (at Colfax). Instrumental workshops are planned as are screenings of film documentaries. Ticket prices vary, including concert-only, full-day and weekend passes ($25 to $135). Visit: events.swallowhill.comeventperformances.asp?evt=1153.

“North American Sculpture” is open through Aug. 29 at Foothills Art Center, 809 15th St., Golden. It includes an Emerging Sculptor Showcase. Sculptor John McEnroe will speak at 7 p.m. Tuesday, SAug. 3 and Saturday, Aug. 21 is SCFD Free Day. 303-279-3922, www.foothillsartcenter.org.

Theatre of Dreams in Castle Rock has added a second performance at 4 p.m. July 25, of “The Mysterious World of Alain Nu” by the Las Vegas entertainer and author of “Picture Your ESP.” Reservations are necessary, 303-660-6799. Tickets: $20.

“Flourish! Remarkable Plants for Your Garden from the Denver Botanic Gardens” will be Panayoti Kelaidis’ subject in a 7 p.m. July 27 lecture at Bemis Library, 6014 S. Datura St., Littleton. Kelaidis is senior curator at DBG and will talk about the history as well as the many unusual plants developed at the gardens which are adaptable for the home garden. Free. 303-795-3961.

Iris lovers will want to attend the Mountains an Plains Iris society’s annual rhizome sale from 9 a.m. to 5 p.m. July 24 and 10 a.m. to 1 p.m. at Tagawa Gardens, 7711 S. Parker Road, Aurora. All plants are locally grown by members, who maintain a lovely iris garden at Hudson Gardens. Free information. Information: www.coloradoiris.org. Steve Blecher of Littleton is local organizer.

“Eric Clapton Crossroads Concert 2010” at 7:30 p.m. July 27 in local movie theaters will present two hour show of performances recorded at the day-long sold out June 26 event in Chicago. Clapton, ZZ Top, Steve Winwood, BB King, Jeff Beck, Vince Gill, Sheryl Crow and more. Highlands Ranch AMC 24, Castle Rock 12, Greenwood Plaza 12, Bel Mar 16, Regal River Pointe in the south area. www.fathomevents.com.

Cajun Zydeco Dinner and Dancin’ Event will mark a return of the Zydematics to Cherokee Ranch and Castle starting at 5 p.m. July 25. $25 adults; $10 12 and under. Reservations required. 303-688-4600. Information, www.cherokeeranch.org. Location: 6113 Daniels Park Rd., Sedalia.

Call for artists: The 2010 Lone Tree Art Exhibition and Sale is accepting entries for the ninth annual show, scheduled Oct. 2 to 24 at Lone Tree Golf Club and Hotel. Deadline is August 20. Categories: Oil, water media, pastels, mixed media, sculpture. Prizes estimated at $4000. Entry application at: www.cityoflonetree.com/artexhibition.

Littleton Symphony, directed by Jurgen deLemos, will hold auditions during July and August for string players and Second Trumpet. There are required trumpet excerpts and audition requirements for strings. Call for information and appointment: 303-989-4727 or contact info@littletonsymphony.org.

Curtis Arts and Humanities Center presents its 27th Annual All Colorado Art Show from through August 6 at 2349 East Orchard Rd., Greenwood Village. Internationally known painter Quang Ho, the 2010 juror, will lecture on “Good Art, How and Why it Works” at 6:30 to 7:30 p.m. July 23 at Greenwood Village City Hall, 6060 S. Quebec, then will move to Curtis to conduct a gallery walk at 7:45 p.m. Gallery hours: 10 a.m. to 5 p.m. Tuesdays through Fridays; 5 to 7 p.m. Thursdays. Admission free. 303-797-1779.

The Exotic Sports Car Show and Concours D’Elegance, a benefit for the United Cerebral Palsy Colorado organization which was washed out in the June 13 monsoons, is re-scheduled at Arapahoe Community College from 9 a.m. to 3 p.m. Aug. 8. Adults $10, Children under 12 free. www.cpco.org.