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
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.