100 Miles in 100 Days Challenge

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's regional park system provides the perfect venue for hiking, trail running, mountain biking, and horseback riding.

PROGRAM GUIDELINES
Welcome to the 2025 100 Miles in 100 Days Challenge! The program began at 6 a.m. on November 1, 2024, and it closes at 4 p.m. on February 8, 2025. Below are the guidelines for the program:
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) mountain biking or horseback riding (50 miles) = 125 total miles. Mountain biking or horseback riding (150 miles) hiking or trail running (25 miles) = 175 total miles.
PARKS AND TRAILS
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.
TREKKING LOG
All participants must log and report their miles throughout the Challenge. Please note that the Elog has been retired from the program. The app may be downloaded at: Apple Store: https://apps.apple.com/us/app/100-miles-in-100-days/id6443625644 Google Play: https://play.google.com/store/apps/details?id=io.appery.hundredmilechallenge&hl=en_AU Web-based application: https://miles.app.appery.io/#/signin. This option is a good option for participants who do not wish to download apps onto their phones. The app is user-friendly on laptops, desktops, and tablets. The Challenge app will be available for use during the 2025 season. Information will be posted on the website once it is available. Remember, the app automatically locks at 4 pm on February 8, 2025. Please make sure you've entered all of your treks before the cut-off. The app will activate on November 1, 2024.
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 Survey Monkey tee shirt form. The form will be posted on this page in January 2025. Order Form. Shirt order forms must be submitted by 4 p.m. on February 8, 2025, 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.
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), you must complete your Challenge. If the selected winner currently holds an Annual Pass, the Annual Pass will be renewed for one year upon the date of expiration.
QUESTIONS
Should you have questions about the program, please reach out to the rangers in the parks or email maricopacountyparks@maricopa.gov.
PARTICIPATING LOCATIONS
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. Adobe Dam Regional Park* Buckeye Hills Regional Park* Cave Creek Regional Park Estrella Mountain Regional Park Hassayampa River Preserve Lake Pleasant Regional Park McDowell Mountain Regional Park San Tan Mountain Regional Park Spur Cross Ranch Conservation Area Usery Mountain Regional Park White Tank Mountain Regional Park