Early August 2026 Doug Sanders (friend of Mill Valley StreamKeepers) took this video of 3 river otters in Warner Creek near Sycamore Avenue. Looks like they are eating crayfish which is good because crayfish are not native to our waterways. It's great to the see the otters around. It shows that there is good access to the Bay, that our watershed is good shape and that the water quality is high!

Recently, Mill Valley StreamKeepers funded a new study conducted by renowned fish expert Ross Taylor (with help from Marin RCD's Sarah Phillips and GeoMorph's Matt Smeltzer) which shows that there is a good presence of salmonids including Steelhead and Rainbow Trout in Old Mill Creek. The study also identifies the fish passage barrier at the bridge at Cascade Drive as the best prospect for removal and improvement in the Arroyo de Corte Madera del Presidio (ACMdP) watershed. Click here for the...

Find out what StreamKeepers have been up to in 2025 in our new newsletter! This is useful info especially for those who care about our creeks, live next to MV creeks and everyone else. Any questions or want to get involved contact Mike at mm03246@gmail.com or Betsy at betsywbikle@gmail.com . And visit MillValleyStreamKeepers.org .