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

May 2019

25 - Run for the Future 5K/10K (Sunnyvale)
25 - Sugar Rush 5K (San Jose)
26 - Mushroom Mardi Gras 5K/10K (Morgan Hill)

June 2019

  1 - Calero Park Run 2.8M/9M/16M/32M/50M (San Jose)
  1 - China Camp Trail Run 5K/10K/Half Marathon (San Rafael)
  1 - Lynch Canyon Trail Run 5K/10K/Half Maraton (Fairfield)
  2 - Alameda Hospital Foundation Run 5K/10K (Alameda)
  2 - Hit the Road Jack Run 2.2M/10K (Sonoma)
  2 - Lake Chabot Trail Challenge 5K/Half Marathon (Castro Valley)
  2 - Leigh Longhorn Stampede 5K (San Jose)
  2 - Trail Quake 5K/10K/Half Marathon (Saratoga)
  8 - Devils Slide Trail Run 4K/11K/13M/30K (Pacifica)
  8 - Lantern Run 5K/10K/Half Marathon (San Francisco)
  8 - Outrun Lupus 5K (San Jose)
  9 - Dipsea Race 7.1M (Mill Valley)
  9 - Sunflower Run 1M/5K/10K (Pleasanton)
15 - San Jose Giants Race 5K/5M (San Jose)
15 - Double Dipsea 13.7M (Mill Valley)
16 - Fitch Mountain footrace (Healdsburg)
16 - Marina Bay Running Festival 1M/5K/10K/Half Marathon (Richmond)
22 - Sunrise Marathon 5K/10K/Half Marathon (San Francisco)
23 - Purple Stride 5K (San Francisco)
23 - Summer Scamper 5K/10K (Palo Alto)
30 - Mare Island 5K/10K/Half Marathon (Vallejo)

July 2019

  4 - 4th of July Parade Run (Redwood City)
  4 - Run San Ramon 5K/10K (San Ramon)
  6 - Dirty Dozen and Half Dozen Endurance Run (Pinole)
13 - Golden Gate Trail Run (Sausalito)
14 - Across the Bay 5K/10K (San Francisco)
20 - Napa to Sonoma Wine Country 5K (Sonoma)
21 - Animal Run 5K/10K/Half Marathon (Richmond)
21 - Napa to Sonoma Wine Country Half Marathon (Sonoma)
21 - Windmill 10K (San Francisco)
27 - Bad Bass 5K/10K/Half Marathon (Castro Valley)
28 - San Francisco Marathon (San Francisco)
28 - Wharf to Wharf 6M (Santa Cruz)