THIS WEEK

Fitness challenge: Marines of 1st Radio Battalion challenge individuals and teams in this six-discipline event, 8 a.m. Aug. 9, Marine Corps Base, Kaneohe Bay. Entry fee: $15 per person; or $25 per team, if registering by Aug. 4. A $5 late fee will be added after Aug. 4. Information, 254-7589.

Contra dance: 7:30-10:30 p.m. Aug. 9, Kapiolani Community College's Little White Chapel on Diamond Head Road. Music provided by Beyond the Pale. No partner or experience needed. Orientation, 7 p.m. Cost: $5. Information, 988-5477 or online at http://www.lll.hawaii.edu/contra.

Lyon Arboretum: Bird walk for novice walkers, 8:30-10:30 a.m. Aug. 9. Meet in the parking lot. Cost: $9. Limited enrollment. Call, 988-7378.

Hawaii Nature Center: "Oahu Prowling Predators," 9:30-11:30 a.m. Aug. 9. For children ages 6-8. Cost: $7. Reservations required. Call 955-0100.

Box Car racing: Aug. 9, lower parking lot of Market City Shopping Center. Donation: $1. Information, 947-3393.

Pacific Rim Jaycees: Storm drain stenciling project, 9 a.m.-noon Aug. 10. Meet at the Hawaii Jaycee Resource Center. For information call Kevin at 371-8671; or Naomi at 949-2154, or pager 598-8673.

Hawaiian Trail and Mountain Club: 12-mile, advanced hike, 8 a.m. Aug. 10, Manana, Pacific Palisades. Cost: $2. Bring lunch and water. Wear sturdy shoes and clothing. Reservations with Doug Klein, 235-8330.

Trail maintenance, Pauoa Woods, Aug. 10. Call 674-1459, 377-5442 or 734-5515.

"Slugfest": 9:30 a.m. Aug. 10, Hawaii Nature Center. For children ages 3-5. Cost: $7. Reservations required. Call 955-0100.

Beach picnic: Daughters of Hawaii and Calabash Cousins present a junior social, 10 a.m. Aug. 10, Lanikuhonua Cultural Institute. Potluck lunch. Dessert and drinks provided. Buses available, 9:30 a.m. from Queen Emma Summer Palace. Cost: $5 plus a dish. Information, 595-6291.

Fashion show: "Mohala Ka Pua, Ua Wehe Kaiao," 5 p.m. Aug. 14, Wailuku Community Center, Maui. Cost: $30 per person or $250 for a table of 10. Information, 1-808-244-5676.

Honolulu Zoo by Moonlight: See what animals do at night, 6:30-8:30 p.m. Aug. 16-19. Cost: $5 children; $7 adults. Tickets available in advance at the zoo's box office. Information, 971-7176.

Ho'omaluhia Botanical Garden: Learn about plants the early Hawaiians used, 10 a.m. Aug. 15. Free. Bring walking shoes, bug repellent and rain gear. Reserve at 233-7323.

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CONTINUING

"Learn-to-Live": Adult swimming classes, 5:15 to 6 p.m., Mondays, Wednesday and Thursdays through Aug. 21, Ala Moana Beach Park, Lifeguard Stand 1E. Free.

Tai Chi Chuan: Chinese art reducing anger and stress, and increasing softness and flexibility, 4:30 to 5:30 p.m. Mondays and Thursdays in Kekela Gym, Queen's Medical Center. Cost: $35. Register at 547-4780. For other classes, visit the center's Web site at http://www.queens.org.

Honolulu Marathon Clinic: Weekly jogging program with Dr. Jack Scaff Jr., 7:30 a.m. Sundays, Kapiolani Park Bandstand. James Honke leads a 6:30 a.m. program Sundays, Wahiawa Recreation Center.

Taiko classes: The Taiko Center of the Pacific offers classes through Kapiolani Community College. Call 737-7236.

Hawaii In-Line Skating Association: Workouts 5:30 p.m. weekdays at Kakaako Park. Call 988-5299.

Free hike to Diamond Head: Meet the Clean Air Team at the Honolulu Zoo entrance, 9 a.m. Saturdays. Three miles to the top. Call 948-3299.

Honolulu Community Drum Circle: Drummers, percussionists and dancers gather, 1-5 p.m. Saturdays, Keehi Lagoon Park. Potluck. Call 377-DRUM (377-3786) to confirm location each week.

Hash House Harriers: Social runs with Aloha group 3 p.m. Saturdays; call 948-AHHH (948-2444). Or Honolulu group 5:30 p.m. Tuesdays; call 948-HASH (948-4274).

Honolulu Marathon Clinic: Free training runs with Jack Scaff and staff, 7:30 a.m. Sundays, Kapiolani Park Bandstand. Call Norm at 247-4957. No meetings on three-day weekends.

Sports Acrobatics Hawaii: Hawaii Highflyers Trampoline Club for adults and kids, 4 and 5 p.m. Mondays and Wednesdays, McCully Recreation Center. Call Karl Vorwerk at 949-3747.

Waikiki Acrobatic Troupe meets 4 p.m. Sundays at the beach across Kapiolani Park Bandstand; free workout at UH Studio Four 8 p.m. Wednesdays. Call Don Heafner at 536-7205.

Ikebana classes: Lillian Koide teaches flower arrangement 9 a.m. to noon Wednesdays at the Japanese Cultural Center. Tuition $30 per month plus supplies. Call 537-5765, evenings.

Honolulu Zoo: Zoo opens at 8 a.m. on the first and third Wednesdays of the month. General admission $6; $2 with Yum Yum Tree senior card. First Wednesdays feature a botanical tour at 8:45 a.m. for $2 more. Third Wednesdays, tai chi practice begins 8 a.m. Call 971-7174.

Nature Conservancy hikes: Two guided hikes a month to Honouliuli Preserve, home to more than 45 rare native plants and animals. Donation. Call 537-4508.