The City has a full calendar of Earth Month events this April, from insect fairs to community garden tours. The observance traces its roots to April 22, 1970, when Sen. Gaylord Nelson organized a national teach-in that eventually grew into a global movement. This year's theme, "Our Power, Our Planet," centers on community-driven action around clean energy and environmental protection. The City's complete calendar is at riversideca.gov; below are four highlights.
Blue Zones Project Riverside: Moai Launch Party
Saturday, April 18
Blue Zones Project Riverside is throwing a free launch party to kick off more than 20 new Moais — small social circles rooted in an Okinawan tradition linked to longer, healthier lives. In Okinawa, Japan, one of the world's recognized longevity cultures, moais are lifelong social support groups in which members commit to supporting each other's health, finances and wellbeing. Blue Zones Project Riverside, a five-year community health initiative, launched in Riverside in 2025.
The event is at Riverside Municipal Airport and features music, açaà bowls, coffee and giveaways while supplies last.
Riverside Insect Fair
Saturday, April 25
The annual Riverside Insect Fair returns to the Main Library at 3900 Mission Inn Ave. from 10 a.m. to 4 p.m. More than 50 vendors will be on hand alongside cockroach races, live entertainment and a butterfly tent featuring live butterflies presented by the Museum of Riverside. UC Riverside entomology graduate students will staff their own booths, and the Wyland Mobile Learning Experience, sponsored by Riverside Public Utilities, will be on site. The Riverside Arts Council hosts a creative art experience inside the library. Admission is free.
2026 Riverside Community Flower Show and Garden Tour
Saturday–Sunday, April 25–26
The annual Riverside Community Flower Show and Garden Tour runs both days at the Riverside Elks Lodge with this year's theme: Garden Party. Longtime partners including the Raincross Rose Society, the Riverside/San Bernardino Counties Orchid Society, the Inland Region Iris Society, the Inland Koi Society and UCCE Riverside Master Gardeners will have displays on site alongside a craft and vendor fair. The free flower show runs 9 a.m. to 5 p.m. both days.
For an additional $10 (free for ages 16 and under), visitors can take a self-guided tour of six local home gardens. The tour runs 10 a.m. to 5 p.m.
Plant Bingo at Riverside Airport
Wednesday, April 22
The Airport Terminal Lobby hosts a free plant-themed bingo event on Earth Day from 10 a.m. to noon. Winners of each round take home a plant or flower while supplies last. Seating is limited.
More information: The full City of Riverside Earth Month calendar, including additional events throughout April, is available at riversideca.gov/press/earth-month.
The "Ojos del Tiempo" installation features rotating works by local and nationally recognized artists alongside bilingual literature celebrating the neighborhood's Mexican-American roots.
