Shamrock Run Portland Half Marathon, 15K, 8K & 5K

Sunday, March 16, 2025 • Portland, OR • Course Map

Start your St. Patrick’s Day celebration early with Portland’s Shamrock Run Half Marathon. With courses of 15K, 8K, and 5K along with the half marathon, there’s a course for every skill level (including a walker-only wave for walking the 5K course).

All events start at SW Naito Parkway and Pine Street in downtown Portland, near Waterfront Park. From there, half marathoners start running with the 15K participants along SW Naito Parkway for the first mile before the 15K runners turn around. Half marathon runners continue down SW Naito Parkway and NW Front Avenue for another two miles before turning around and running toward downtown Portland. The rest of the course weaves through Terwilliger Parkway (and its hills) and back up SW Naito Parkway before finishing near the start line at Waterfront Park.

Make sure to stay for the after-party — finishers get a free beer courtesy of Widmer Brothers (for runners over 21), delicious salmon chowder, and live music to celebrate their finishes. Runners also receive tech shirts and finisher medals (including a bottle opener medal for the half marathon), and the top finishers in each age group receive a commemorative sports bag. If you run really fast and like beer, this is the race for you — the male and female overall winners of each event will win their weight in beer. So start training and maybe that’ll be you.

The half marathon is capped at 3,000 participants and has sold out in the past, so register soon to reserve your spot.

Runners rush from the Shamrock Run Portland start line

Shamrock Run half marathoners rush from the start line. (Photo credit: Shamrock Run Portland)

Shamrock Run Portland runners cross the finish line. (Photo credit: Shamrock Run Portland)

Shamrock Run Portland runners cross the finish line. (Photo credit: Shamrock Run Portland)

Race Weather & Climate

Like much of the Pacific Northwest, Portland experiences cool weather in late winter and early spring, with record temperatures as low as 24° (1989) and as high as 79° (1994). The precipitation average is just over 4.5 inches for the month of March.

On race day (Mar. 16), the average low is 40ºF and the average high is 55ºF.

Past Results

View past results for the Shamrock Run Portland Half Marathon here.

Course Map

See the race route map for the Shamrock Run Portland Half Marathon here.

Starting Time

  • 8:00 AM – 5K
  • 8:55 AM – 15K
  • 9:20 AM – half marathon
  • 10:10 AM – 8K


see race website


To reserve your spot in the 2025 running of Portland’s Shamrock Run Half Marathon, visit the event website below.

Official Race Website

See more races in: March, Oregon