The Ernie Howlett 5k Run/Walk, Kids Run, and Health Expo is held at Rolling Hills Estates on scenic, soft-packed trails. Race, expo, costume contest and food drive benefit Harbor Interfaith Services, a nonsecular agency serving the homeless and working poor for 44 years. Fees: $35/individual, $25 team members, includes a T-shirt, until March 27. Sponsorships are available. Race day sign-up is 6:30 a.m.
7:30 a.m. Ernie Howlett Park, 25851 Hawthorne Blvd., Rolling Hills Estates. harborinterfaith.org/support-us-2/heart-the-homeless-5k; 310-831-0603