Films and other events

SOUTH AMERICA

Slide show

Mort Loveman will present “Bolivia and Lake Titicaca”

When, where: 1 p.m. Wednesday at Roxbury Park Community Center, 471 S. Roxbury Drive, Beverly Hills.

Admission, info: $1 for Beverly Hills residents; $2 for others. (310) 285-6840

MOUNTAIN BIKING

Workshop

Experts will offer tips for beginners to advanced riders, including bike safety, clothing, shoes and pedals.

When, where: 6:30 p.m. Wednesday at the REI store in Tustin, 2962 El Camino Real.

Admission, info: Free. (714) 505-0205

BACKPACKING

Workshop

Learn about the latest lightweight gear, plus how to travel faster and farther with less weight on your back.

When, where: 7 p.m. Wednesday at the REI store in Rancho Cucamonga, 12218 Foothill Blvd.

Admission, info: Free. (909) 646-8360

PHOTOGRAPHY

Field class

Dennis Mammana will teach participants how to create celestial portraits, including tips on setting up and shooting under a real night sky.

When, where: Two-day workshop Oct. 8 and 9. Oasis Visitor Center, Joshua Tree National Park.

Admission, info: $85. (760) 367-5535 or https://www.joshuatree.org.

REPTILES

Field class

Biology professor William Hayes will discuss the venomous and non-venomous snakes of Southern California, including physiological and behavioral traits.

When, where: 9 a.m.-4 p.m. Oct. 9, Joshua Tree National Park, Black Rock Visitor Center, 9800 Black Rock Canyon, Yucca Valley.

Admission, info: $60, (760) 367-5535 or https://www.joshuatree.org

Please email announcements at least three weeks in advance of the event date to travel@latimes.com.