Orange Curtain 100K / 50K / 30K / 10K
How fast can you run 100KM?
until race day
Race day is April 16-17, 2021
The Orange Curtain 100 km race is a 10 kilometer out and back (repeated 10 times) along a 5 kilometer segment of the asphalt and dirt bike path on the east side of the San Gabriel River in Cerritos, Lakewood, and Long Beach, California... read more
Register at Remember early registration will be the most affordable.

The Orange Curtain marathon distance is a Boston Qualifier (USATF Course Certificate #CA19020RS). This is a FAST course which makes it a great Boston qualifier run.

Good to know information

  • Race pictures: Andy Kumeda and Chuck Sohaskey
  • Newly added: 7PM Fri (24H), 6AM Sat (12H), 7AM Sat (6H), 8 AM Sat (Marathon)
  • 30K/10K fun run/walk added also for family/friend while waiting
  • The start time is 6:00 am(100K), 7:00 am(50K), 8:00 am(30K, 10K)
  • Cutoff time is a very generous 14 hours
  • Course has adjoining dirt path for 90% of distance
  • Aid Stations will be located at the north and south ends of the course
  • Starting location is Liberty Park in Cerritos, 19211 Studebaker Rd, Cerritos, CA 90703
  • Parking is free at the start location
  • Race course is certified by USATF, certification code: CA17011RS
  • USATF recognition and International Association of Ultrarunners (IAU) bronze labels for the 50K and 100K
  • ​Sponsor race of SoCal Ultra Series
  • Our Courses are certificated by: