The Southern Nevada Rock Art Association meets on the fourth Monday of every month, starting at 6:30 p.m., in the REI store in Boca Park. Admission is free and anyone interested in rock art is invited to attend. There's usually a program on rock art and/or archeology, most often local or regional.
The Wetlands Park in Las Vegas has guided walks, talks, and programs every month. Some require advance registration. April 28 from 9 a.m. to 1 p.m.: BioBlitz, a fun day of science in the park! Identify plants and animals with the help of expert scientists and naturalists. All observations are entered into a global database, iNaturalist.