Motorists should be prepared for traffic delays with the many events going on this weekend, said the Seattle Department of Transportation.

On Saturday, bicyclists will be celebrating Tour de Fat at Gas Works Park and downtown Seattle will busy with the Seafair Torchlight run and parade.

More than 4,000 people are expected to attend the Tour de Fat from 10 a.m. to 5 p.m. and cause congestion on streets near Gas Works Park.

The Seafair Torchlight Run begins at 6:30 p.m. Saturday, but the northbound lanes of the Alaskan Way Viaduct will be closed for the run starting at 5:30 p.m. The closure from just south of the West Seattle Bridge to Roy Street will go until 7 p.m.

The walk and run route starts and finishes at Ninth Avenue North and Republican Street. Participates will follow the parade route through downtown Seattle.

The Torchlight Parade route starts at Fourth Avenue North and Broad Street, then goes south on Fourth to South Washington Street; west on Washington to Second Avenue South; south on Second to King Street; disperses in the north lot of Qwest Field.

The parade route closes from 5:30 p.m. to 12 a.m.

No on-street parking will be allowed starting at 8 a.m. to accommodate parade staging on streets around the Seattle Center. Streets will be closed at 3 p.m. in the staging area on the east side of the Seattle Center.

No on-street parking will be permitted along the parade route and on some adjacent streets beginning at 4 p.m.

About 300,000 people are expected to attend the parade from 7:30 p.m. to 11 p.m.

After the parade is over there will be a special boarding location, mid-block on Third Avenue between Union and Pike streets, for three Metro routes – the 7, 36 and 124 headed southbound out of downtown.

Metro buses will be rerouted away from the parade as early as mid-afternoon, SDOT said. A good option is traveling to downtown via the transit tunnel, but plan your trip home before the last bus or light rail train leaves the tunnel that night.

The West Seattle Water Taxi is a good alternative for people coming from West Seattle; the last return sailing leaves Pier 50 in Seattle at 10:30 p.m.

There will be no Sounder train service, but Sound Transit’s Link will run at 10 minute headways till the end of service at 1 a.m.

On Sunday, thousands are expected to gather at Seward Park for the Pista sa Nayon festival for the Filipino-American community.

About 12,000 people are expected to attend the festival from 9 a.m. to 8 p.m.

Heavy congestion is expected around the park and in the surrounding neighborhoods.