The Precinct 4 GeoChallenge is a precinct-wide geocaching event sponsored by Harris County Precinct 4. Participants will be introduced to the trending pastime of geocaching while experiencing the abundance of amenities Precinct 4 has to offer. The GeoChallenge contains a series of 100 geocaches, all of which are easy to find. However, attainment of certain geocaches may require elevated physical activity.

If you save Precinct 4 GeoChallenge #1 – Dennis Johnston Park as your last find, you can come in to the parks department offices and pick up your prizes (see below) while you’re there. Have fun, and thanks for visiting!


  • First, create an account on to access details and coordinates for all 101 Harris County Precinct 4 geocache locations. Participants are encouraged to visit as many geocaches as possible.


  • Using your GPS-enabled smartphone or GPS unit, navigate to the coordinates for each geocache and find the container. Open it, write your login name and the date in the log book, and return the sealed container to its hiding place.


  • Participants can verify that they have found a geocache by 1) writing the unique code from the geocache on their passport, which can be downloaded at the bottom of this page or 2) presenting a unique bottle cap gathered from each of the geocaches.


  • A bronze pathtag is awarded to those who find at least 25 geocaches; a silver pathtag is given for locating at least 50 geocaches; and a gold pathtag is the prize for logging 75 geocache locations. Those who find all 100 geocaches can earn a collectible Precinct 4 geocoin.


  • To claim a prize, either mail your completed passport or hand-deliver your passport and/or bottle caps to the Harris County Precinct 4 Parks Office, located within Dennis Johnston Park at 709 Riley Fuzzel Road in Spring, TX 77373.


  • If mailing a passport to receive a prize(s), please make sure to enter all necessary contact information.


  • Please limit one bottle cap per account!