Traffic alert! The 34th Honolulu Marathon takes off early tomorrow morning, from downtown, along Ala Moana, to Kalakaua, Monsarrat, to Kilauea, to Kalaniana'ole Highway, Hawai'i Kai Drive and back to Kapi'olani Park.

And even if you're not a runner, you can attend the continuing Honolulu Marathon Expo at the Hawai'i Convention Center today. Highlights include appearances by Isle-born actress Kelly Hu from 11 a.m. to 1 p.m.; and actor Naveen Andrews of the filmed-in-Hawai'i TV hit "Lost" from 2 to 4 p.m.

Expo hours are from 9 a.m. to 5 p.m. It's free. www.honolulumarathon.org.