The Creek and Its Watershed

Wolf Creek begins above Grass Valley, California, flows through the city, turns roughly south, and eventually joins the Bear River at Nevada County’s southern border. The creek and its tributaries drain a significant portion of southwestern Nevada County. Wolf Creek has historically been neglected and under-appreciated, but that has begun to change as Wolf Creek Community Alliance works to preserve and protect Wolf Creek and its watershed for the benefit of present and future generations.

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In the Current

Know Your Watershed Week April 28 - May 6. The first annual Know Your Watershed Week will celebrate the Yuba, Bear, and American River watersheds with many activities hosted by 20 organizations. For more information and a calendar of events, visit

2018 Wolf Creek monitoring calendar. The water-quality monitoring days for 2018 are listed here for your convenient reference, along with information about becoming a monitor.

Heavy metals map. See where our testing has revealed amounts of mercury, cadmium, lead, or arsenic that are over the recommended human exposure thresholds.

Support Wolf Creek Alliance at no cost! Every time you shop at SPD, Save Mart, Lucky, and FoodMaxx, 3% of your purchase amount can go to WCCA without any money coming out of your own pocket. FIND OUT HOW

We need your support! On the Support Our Work page, you can donate to WCCA quickly and easily using PayPal or a credit card, and you can learn about other ways of supporting our work.

iNaturalist observations. View observations from Wolf Creek naturalists on


Program Areas

  • Water quality monitoring
  • Ecological assessments
  • Ecological restoration
  • Wolf Creek Parkway
  • Creek-friendly landscaping
  • Watershed awareness
  • Creek-friendly development
  • Idaho-Maryland Mine project