Join the Surfrider Foundation, Oahu Chapter in cleaning up Diamond Head Beach on Sunday, May 11.

The cleanup runs from 3 to 5 p.m. Meet at the top of the paved path by the water fountain.

Refreshments and supplies will be provided.

A surf/paddle will commence after the cleanup from 5 to 6 p.m., with a dinner at Diamond Head Cove and South Shore Grill — both on Monsarrat Avenue — to follow.

“Ho’omalu Kahakai – Protecting the Beach” is a monthly clean-up of the Surfrider Foundation, Oahu Chapter. Working to improve ocean water and beach quality, to keep and open access to the ocean for all to enjoy, and to assure that all development on our island is responsible by having minimal impact on our coastal environment.

For more information visit www.surfrider.org/oahu.

Join the Maui chapter of the Sierra Club in a beach cleanup and bonfire at Kapa‘a on Saturday, May 17.

Meet in the late afternoon and enjoy a picnic and bonfire on the beach.

The chapter will supply cold drinks and equipment.

For more information call Karen Tilley at (808) 821-8008. Visit www.hi.sierraclub.org/kauai.

Come help remove false ‘awa (Piper auritum) from a stream bed in the Ahuimanu community of Kāne‘ohe on Oct. 11.

The project will run from 8 a..m to 3 p.m.

False ‘awa looks a little bit like true ‘awa, the traditional Hawaiian medicinal drink, but has a brighter green leaf with a red piko. False ‘awa is often mistaken as true ‘awa. It is currently being cultivated in gardens, agricultural fields, and yards by people who think they have true ‘awa.

False ‘awa is a garden pest. It grows and spreads vegetatively like a weed, out competes desirable plants like taro and has no medicinal properties.

Take along more water than you think you will need — at least 2 quarts. Bring gloves, hat, sunscreen, rain jacket, long pants, long sleeves, and sturdy walking shoes. No slippers! Pack a good hearty lunch because we will be working hard!

Meet at the Church of the Crossroads parking lot. Going mauka on University Avenue, take your first left after the King/University intersection onto Coyne St. Then take your first right onto Kaialiu Street. The parking lot is located on the right, just after the road curves.

RSVP by Thursday, Oct. 9 to Julia Parish at oisc@hawaii.edu or 286-4616.

Join the OISC to help remove invasive manuka (Leptospermum scoparium), on Waiau trail on Saturday, Sept. 13.

The project runs from 8 a.m. to 3 p.m.

Manuka, New Zealand tea tree, is a ornamental shrub native to New Zealand and Australia, which grows up to 20 feet in height with small white to pink flowers and needle-like leaves. It was introduced during forestry efforts to stabilize soils and prevent erosion.

Manuka is an aggressive invader, capable of crowding or shading out natives by developing dense thickets and producing wind dispersed fire-resistant seeds. This tree has successfully invaded some of the most pristine native ridges and valleys on O‘ahu.

Come help OISC prevent its spread!

Take along more water than you think you will need — at least 2 quarts. Bring gloves, hat, sunscreen, lunch, rain jacket, long pants, long sleeves and sturdy walking shoes. No slippers! Pack a good hearty lunch because we will be working hard!

Meet at the Church of the Crossroads parking lot. Going mauka on University Avenue, take your first left after the King/University intersection onto Coyne St. Then take your first right onto Kaialiu Street. The parking lot is located on the right, just after the road curves.

RSVP by Thursday, Sept. 11 to Julia Parish at oisc@hawaii.edu or 286-4616.

The Sierra Club, Hawai‘i Chapter is looking for volunteers to help clean up Sandy Beach on Sunday, July 13.

Meet at 8:30 a.m. at the bathrooms on the eastern side of the beach park. The cleanup will take place along the highway and coastal areas.

Bring water, hat, sunscreen and closed-toe shoes. No slippers! Bags and gloves will be provided.

For more information call Deborah Blair at 955-4168. Visit www.hi.sierraclub.org.

Join volunteers in cleaning up the Ala Wai Small Boat Harbor on Saturday, July 12.

Meet at 8 a.m. at the harbormaster’s office between the third and fourth rows of boats behind the ‘Ilikai Hotel. Park in street stalls or in the public lot ‘ewa of the Hilton lagoon.

Wear sturdy shoes with gripping soles, a hat, thick rubber gloves, sunscreen and water. No slippers!

For more information call Deborah Blair at 955-4168. Visit www.hi.sierraclub.org.

Join OISC in removing invasive alien plants at the Kalihi Valley Nature Park on Saturday, July 12.

The project runs from 8 a.m. to 3 p.m.

The Kokua Kalihi Valley is a community-organized and community-operated non-profit organization that is creating a nature park on 100 acres of public land that have been designated for park development for more than 25 years.

The project will include creation of as many as 20 acres of community and native Hawaiian gardens, preserve and restore ancient Hawaiian agricultural walls and terraces, and the creation of new walking paths and hiking trails.

Currently, the site is overgrown with exotic species. Our hope is to help remove alien plant species to make room for native species. Kokua Kalihi Valley’s goal for the park is to create “a place of quiet recreation, nature studies, health education and the preservation of Hawaiian culture.”

Expect difficult hiking. Bring bag lunch, hiking shoes, sunscreen, and water. Meet at the Church of the Crossroads parking lot.

RSVP to 286-4616 or oisc@hawaii.edu.

Help the Honolulu Board of Water Supply restore the native forest in Makaha Valley by removing alien trees on Saturday, June 28.

Meet at the entrance of the Wai‘anae Small Boat Harbor at 8:15 a.m. From there, volunteers will carpool to the site.

Be prepared for a moderate 30-minute hike to the service site.

For more information call Arlene Buchholz at 988-9806 or Randy Ching at 942-0145. Visit www.hi.sierraclub.org.

The Sierra Club, Hawai‘i Chapter is looking for volunteers to help remove invasive Himalayan blackberry on Mau‘umae Trail on June 14.

The service project will run from 8 a.m. to 3 p.m.

Himalayan blackberry (Rubus discolor) is a thorny vine native to western Europe. Division of Forestry and Wildlife “Hawai‘i’s Most Invasive Horticultural Plants” list includes all species of the genus Rubus. Blackberry forms dense impenetrable thickets that exclude other native plant species, and make access difficult for hunters, hikers, and other visitors to forests.

These thickets can produce 7,000 to 13,000 seeds per square meter, which can remain dormant in the soil for several years.

Blackberry occurs in only a few locations on O‘ahu. We can get rid of it before it takes over!

We will hike along a well maintained trail for one hour before arriving to the site. The hike to the work site will be an hour long on a hot, sunny, exposed ridgeline.

This volunteer trip is for advanced hikers. Expect difficult hiking. Bring bag lunch, hiking shoes, sunscreen and water.

Meet at the Church of the Crossroads parking lot.

RSVP to 286-4616 or oisc@hawaii.edu.

The Sierra Club, Hawai‘i Chapter is working with Ahahui Malama i ka Lokahi at Kawai Nui Marsh on Saturday, May 24.

Volunteers will work in a native plant garden off Kapa‘a Quarry Road in Kailua.

Meet at 8:30 a.m. on the right side of the road about one mile from the intersection of Kapa‘a Quarry Road and Kalaniana‘ole Highway.

Bring work gloves, water, lunch, insect repellent, tools such as sickles and pruners.

For more information call Arlene Buchholz at 988-9806 or visit www.hi.sierraclub.org.