100 Miles in 100 Days Challenge


NOVEMBER 1, 2023 - FEBRUARY 8, 2024

100 Miles Challenge Began on November 1, 2023.  

Each year, the 100 Miles in 100 Days Challenge grows as we challenge park visitors to get outside and connect with nature.  With more than 515 miles of trails, Maricopa County regional park system provides the perfect venue for hiking, trail running, mountain biking, and horseback riding.
Welcome to the 2024 100 Miles in 100 Days Challenge! The program began at 6 a.m. on November 1, 2023, and closes at 4 p.m. on February 8, 2024. Below are the guidelines for the program:    
distance_(3)    MILES  


The program was initially developed for hikers. Over the years, the department has expanded the program to include all user groups. This change required mileage adjustments to keep the program consistent and fair for all participants. Below is the mileage breakdown for the various user groups:
  • Hikers - 100 miles
  • Trail Runner - 100 miles
  • Mountain & E-Bikers - 200 miles
  • Horseback Riders - 200 miles
  • Combo - You may combine options; however, 75 percent of your Challenge must be completed via your primary mode and 25 percent via the secondary mode. For example,
    • Hiker or trail runner (75 miles) add mountain biking or horseback riding (200 miles) = 125 total miles.
    • Mountain biking or horseback riding (150 miles) add hiking or trail running (25 miles) = 175 total miles.


  • Participants must visit at least three Maricopa County parks OR two Maricopa County parks and the Maricopa Trail/Sun Circle Trail. 
  • Our team understands that participants have their favorite trails in city/state parks, and we encourage you to keep trekking in these parks. However, the Challenge is managed and funded by the Maricopa County Parks and Recreation Department funding.

    If you would like to trek in a park managed by another agency, please continue to do so, knowing that the mileage will not count towards Maricopa County's 100 Miles in 100 Days Challenge.

    Participant may NOT combine their logs/miles with another participant's log/miles to reach the 100 or 200-mile goal.

booking_(4)    TREKKING LOG


tshirt    SHIRTS

  • All participants who complete the 100 Miles in 100 Days Challenge will receive a limited edition tee shirt.
  • To receive your shirt, you must complete the Tee-shirt
  • Order Form. Shirt order forms must be submitted by 4 p.m. on February 8, 2024, to help us meet our timeline with the vendor.
  • The pick-up date for the shirts will be posted after the shirt order has been placed with the vendor. You may also send a family member/friend to pick up your shirt.
  • Tee shirts will NOT be shipped to customers.
  • Participants may receive no more than one tee shirt per campaign year, regardless of the number of miles hiked, biked, ridden, or ran.
  • Pets may join participants on hikes; however, participants MUST be human to be eligible to receive a tee shirt and qualify for the grand prize drawing.
  • The administrative team verifies program miles once the shirt order has been submitted. The mileage on the shirt order form is also used to determine program certificates.

gift-card    GRAND PRIZE

  • To be eligible for the grand prize drawing of an Annual Pass ($85 value) and a $25 Nature Center retail voucher (total value not to exceed $110).
  • If the selected winner currently holds an Annual Pass, the Annual Pass will be renewed for one year upon date of expiration.


Should you have questions about the program, please reach out to the rangers in the parks, or send an email to maricopacountyparks@maricopa.gov.    



The following parks are participating in the 100 Miles in 100 Days Challenge.

Please note that there are NO trails located at the park(s) with an * after their name. However, these locations do have roadways, and you may count the mileage you trek on the roadways towards your Challenge.

  1. Adobe Dam Regional Park*
  2. Buckeye Hills Regional Park*
  3. Cave Creek Regional Park
  4. Estrella Mountain Regional Park
  5. Hassayampa River Preserve
  6. Lake Pleasant Regional Park
  7. McDowell Mountain Regional Park
  8. San Tan Mountain Regional Park
  9. Spur Cross Ranch Conservation Area
  10. Usery Mountain Regional Park
  11. White Tank Mountain Regional Park