During peak tick season, October-April, our staff collects ticks at designated tick surveillance sites in the foothills. We identify the different species of ticks found and test for tick-borne diseases like Lyme disease. The table below includes the most up to date tick surveillance data from the District although ticks are active year-round. It’s important to always take precautions when entering a tick-infested area.

  • DEFEND yourself from ticks with an EPA-registered tick repellent.
  • DRESS PROTECTIVELY by covering exposed skin with clothing, wearing long pants and sleeves, and tucking pant legs into socks.
  • DISCOURAGE ticks from around your home by clearing debris and dense vegetation.
  • DO regular tick checks for several days after being in tick habitat and shower or bathe as soon as possible after being in a tick habitat.
  • DETACH ticks immediately using the proper technique.

For more information on ticks, visit our tick page.

Month Trails Visited Ticks Collected Ticks Positive for Bacteria that can Cause Lyme Disease Positivity Rate 5 Year Average Positivity Rate
October 2020 X X X % %
November 2020
December 2020
January 2021
February 2021
March 2021
April 2021
*Table updated monthly. Last updated 1/27/2021.