Two options.:  
Link has a little story about each event or the more traditional listing. https://sweattracker.com/Find/Calendar

January 2019

20 - Redding Marathon (Redding)
26 - China Camp Challenge 5K/10K/Half Marathon (San Rafael)
26 - Coyote Hills 5K/10K/Half Marathon (Fremont)  

February 2019

  2 - Super Guadalupe River Run 1K/5K/10K (San Jose)
  3 - San Francisco 5K/Half Marathon (San Francisco)
  3 - 408K Race to the Row (San Jose)
  9 - Bay Breeze 5K/10K/Half Marathon (San Leandro)
16 - Chabot Trail Run 10K/Half Marathon/30K/50K (Castro Valley)
16 - The Super Run 5K (San Jose)
23 - Mt Umunhum Trail Run 12K/22K/33K/52K (San Jose)
23 - Victory 5K/10K/Half Marathon (Richmond)
24 - Surfers Path 5K/10K (Santa Cruz)