This weekend

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saturday

Sandbox BMX: Registration, 4 p.m.; racing, 5 p.m., Sandbox Track, Sand Island. islandbmx.org.

» Cycling: Sea to Stars, 9 a.m., Mauna Lani Bay to Mauna Kea summit. 49 miles. Hawaiiseatostars.com.

» Rodeo: HWRA Jackpot, 10 a.m., Diamond J Ranch, Waianae. 3D, open barrels, open poles, keiki and amateur novice events. 668-9006. rodeooahu.com.

» Lea Lea Charity Run & Cleanup 5K: 6 a.m., Ala Moana Beach Park. Fundraiser for Japan. 983-3373.

» Trail Running: Maunawili Out & Back, 7 a.m., Pali Lookout. 22 miles, individual and two-person relay. 221-5171.

» Swimming: Jamba Juice North Shore Challenge, 9 a.m., Pipeline to Waimea Bay. 2.3 miles. hawaiiswim.com.

» Tennis: HPTF August Open & NTRP Tournament, Schofield Tennis Complex. hawaiitennis.org.

» Keiki Tradewind Triathlon: 6:30 a.m., Kaneohe MCBH. 254-7590.

SUNday

» Auto racing: HulaCross, Gates open, 8 a.m. Racing, 10 a.m. Kalaeloa Raceway Park. Kalaeloaracewaypark.com.

» Hawaii TV Bowling: Mixed team. 9 a.m., Schofield Bowling Center.

» Multi Sport: Surf ‘n’ Sea Paddle Royale, 9 a.m., Haleiwa Beach Park. 2-mile run, 4-mile SUP or paddleboard or OC1, 700-yard swim. hawaiiswim.com.

» Paddling: PAA Steinlager OC & SUP Races, Makai Pier to Kaimana Beach, 10:30 a.m.; Hawaii Kai to Kaimana Beach, 11:15 a.m. paahawaii.com.

» Hawaii Polo Club: 2 p.m., Waimanalo Polo Grounds. hawaiipoloclub.com.

» Honolulu Polo Club: 2:30 p.m., Mokuleia Polo Grounds. honolulupolo.com

» Rodeo: HNBHA 4D Barrel Race, noon, Sharon Freitas Arena, Makawao, Maui. rodeooahu.com.

» Running: Norman Tamanaha 15K, 6 a.m., Kapiolani Park. mprrc.com.

» Tennis: HPTF August Open & NTRP Tournament, Schofield Tennis Complex. hawaiitennis.org.

» Triathlon: Tradewind, 6:30 a.m., Kaneohe MCBH. 254-7590.