100 Miles in 100 Days Challenge

Welcome to the 2019 100 Mile Challenge! Each year, the 100 Miles in 100 Challenge grows as we challenge park visitors to get outside and connect with nature. With more than 420-miles of trails, Maricopa County's regional park system provides the perfect venue for hiking, trail running, mountain biking, and horseback riding.

While the goal of the challenge is to log 100 miles in 100 days (200 miles for mountain bikers and/or horseback riders), many individuals set personal goals going well beyond the 100 miles. Last year, members from the Challenge team logged:

  • 31 members exceeded 200 miles
  • 18 members completed 300 - 599 miles
  • 3 members completed more than 600 miles

While we do give away an Annual Pass and $25 Retail Center voucher to one lucky recipient at the end of the program (just ask Marilyn Huffine, our 2018 winner), most Challenge members participate in the program to connect with nature and meet new friends.

So, lace up your hiking boots and running shoes, dust off your mountain bikes, and saddle up those horses - let's have a little fun together for the next 100 days!

Community page:

We understand that it can be hard to stay motivated during 100 days, so we hope you will join our Facebook page. The community page is a great way to connect with others participating in the Challenge, share your success stories, find the motivation you need during the holidays, and participate in fun activities!



Challenge celebrations will be hosted on Saturday, March 9, 2019. Please see the event calendar for Challenge celebration times and activities as the interpretive rangers plan the celebrations.

NOTE: The following parks will not be hosting the final celebration - Buckeye Hills Regional Park, Adobe Dam Regional Park, Desert Outdoor Center at Lake Pleasant, Spur Cross Ranch Conservation Area and Hassayampa River Preserve.


  • Program Brochure  - This document includes the program guidelines, a sample trail outline, and the tee-shirt entry form.
  • Park Log - A complete listing of all parks and trails.
  • Blank Log
  • Electronic Log - Please see directions below.
  • Tee-shirt order form - If you are using your own log to record miles, please turn your log in with the tee-shirt order form at the end of the Challenge.


With all of our Challenge members using different types of applications and/or activity trackers to track their miles, we have opted to utilize a Google spreadsheet to house the electronic log.

How do I participate?

  • Take a screenshot of your trek.
  • Email the following information to 100MileChallenge@mail.maricopa.gov
  • App screenshot
    • your name
    • park/trail name
    • date, and miles trekked
  • Once we receive your information, we will enter it into the electronic log for you. This is our way of providing you with an “electronic signature.”
  • This process could take up to 72-hours.
  • For those participating in this process, you do NOT need to submit a hard copy log at the end of the Challenge. Your final email should contain:
    • your shirt size, and
    • name of park where you will attend the celebration

What type of information will be displayed on the electronic log?

  • The only personal information shared on the electronic log is your last name, and first initial (your first name has been hidden from view).
  • Please keep in mind that the mileage for those participating in the electronic log will be on display for all to see.

Can I elect not to participate in the electronic log?

  • Yes, the hard copy logs are always available.

Program Rules and Regulations:

  • The program begins on Thursday, November 1, 2018 and closes at 4 p.m. on Friday, February 8, 2019.
  • Since this is a self-guided program, there is no "official" entry form for the program. Everything revolves around the program logs.
  • All hard copy logs must be turned into the park where you will pick-up your tee-shirt by 4 p.m. on Friday, February 8, 2019, no exceptions.
  • To be eligible for the grand prize drawing of an Annual Pass ($85 value) and $25 Nature Center retail voucher (total value not to exceed $110), participants must visit a minimum of three parks. The Maricopa Trail may be substituted for one park. Logs are checked, so please make sure to visit a minimum of three parks or two parks and the Maricopa Trail.
    • If the selected winner currently holds an Annual Pass, the Annual Pass will be renewed for one year upon date of expiration.
  • ALL miles must be logged within a Maricopa County regional park and/or the Maricopa Trail.
    • We understand that a number of you have favorite trails within other park systems, and we are not trying to discourage you from recreating on these trails. Unfortunately, these trails will not count towards the 100 Mile Challenge because this programs is sponsored by Maricopa County.
    • However, we will make an exception if you begin a hike on a county trail, and it crosses over to another agencies land, we will count it. For example, the Pass MountainTrail at Usery Mountain Regional Park begins in a county park and crosses over to Tonto National Forest land. We will count all miles for trails such as these.
  • Participant may NOT combine their form/miles with another participant's form/miles to reach the 100 or 200 mile goal.
  • You may combine options; however, 75 percent of your challenge must be completed via your primary mode and 25 percent via secondary mode.
    • For example, if you decide your primary mode is hiking (100 miles) and horseback riding (200 miles) is your secondary mode, 75 miles must be hiked and 50 miles must be completed on horseback for a total of 125 miles.
  • Participants must turn in 2019 marketing materials (i.e., logs and entry forms) to qualify.
  • All participants who complete the 100 Miles in 100 Days challenge will receive a limited edition tee-shirt at the park program finale celebration (date to be determined).
  • Tee-shirts will be picked up at the park you drop-off your logs/tee-shirt order forms.
    • Participants may make arrangements to pick-up a shirt from the park at a later date.
    • Tee-shirts will NOT be shipped to customers and park(s) will not be responsible for product not picked up.
    • Participants may receive no more than one tee-shirt per campaign year, regardless of number of miles hiked, biked or ridden.
  • 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.