PORTLAND, Ore. - Democratic presidential candidate Barack Obama will hold rallies in Portland and Eugene this week, his campaign announced Tuesday.

The Illinois senator will hold a rally Friday morning at Memorial Coliseum in Portland and a rally in Eugene at McArthur Court Friday evening. There may be more events on Saturday.

Both events are free and open to the public, but those interested in attending must get a ticket to enter.

You can get a ticket for the Portland event by clicking here or by visiting Obama's Portland campaign headquarters at 3016 Division St. from 2 p.m. to 8 p.m. Wednesday and 10 a.m. to 8 p.m. Thursday.

Doors for the Portland rally will open at 7:30 a.m. with the program beginning at 9:30 a.m.

There are no tickets required for the Eugene event but the campaign is asking people to RSVP by clicking here.

Space is limited for both events, and admission is on a first-come, first-served basis, the campaign said.

For security reasons, no bags are allowed. No signs or banners are permitted either.

Obama collected about $200,000 during a Portland fundraiser and rally in September. His rival, New York Sen. Hillary Clinton, hasn't yet been to Oregon during her presidential campaign.

Ballots for the mail-in primary go out in six weeks. The results are tallied on May 20.

- The Associated Press contributed to this report.