Tuesday Night Twilights

April - Sept, 2019


Tuesday Night Twilight 2019 Schedule

April 2, 16, 23 | May 7, 14, 21 | June 25 | July 9, 16 | August 27 CX | September 3 CX

Nightly Schedule

5:30 to 5:50: Training Race (20 mins)

5:55 to 6:20: C-Race (25 mins) – Podium at 6:25

6:30 to 7:05: B-Race (35 mins) – Podium at 7:10

7:15 to 8:00: A-Race (45 mins) – Podium at 8:05


All races are at the Sonoma County Fairgrounds.

Race Descriptions

Training race

This is targeted at beginner racers or people who have never race before.  There will be coaches and experienced racers teaching criterium racing techniques and strategies throughout the entire race.  Combined women and men field.


This race is targeted at Cat5 and Cat4 women and men racers. There will be coaches for this race as well. No license required.


This race is targeted at Cat4 and Cat3 women and men racers. No coaches. No license required.


This race is targeted Cat3 or higher women and men racers. No coaches. No license required.


We need volunteers for this event! If you can help us run this event please shoot an e-mail to javier_sanchez@keysight.com.


2019 Registration will open soon!

Register for SoNoMas

Registration for SoNoMas opens on January 1st and is $79 per rider ($59 for the Little Piggy). For that you get stocked and staffed aid stations, a categorized competitive race environment on well-marked and technically demanding singletrack, a traffic-controlled mass-start, an amazing prize list, cash payouts for pro racers and a huge post-race meal to bring you back from whatever cave you found yourself in.