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The McKenzie Frenzy, presented by Hammel Dentistry, is back! Just like previous years we have 10, 20, and 30-mile distances, and by popular request we have boosted the Endurance class to 60 Miles!

All info can be found on the event page here:

Registration is here:

About the Venue: McKenzie Ranch Trails Park is Pima County's only competitive MTB trail that was built by SDMB in partnership with Pima County and consists of multiple single track loops. The chosen race course consists of 10 miles of twisty, fast, flowy, punchy, put a smile on your face, machine-built single track goodness. Groups will ride up to six laps around the 10 mile outer loop. To see the description and elevation profile go to:

This event is being put on by the Dirty Bunny Outdoor Club, Inc, but all proceeds will benefit Sonoran Desert Mountain Bicyclists which pour their efforts into local trail projects like McKenzie Ranch, Fantasy Island, Mockingbird Trail, Enchanted Hills, 100-Acre Wood Bike Park, and many others!

Distances and categories are as follows:

  • 10 Mile Beginner
  • Men and Women Open Beginner
This category is specifically designed for younger riders and those new to racing. Please sign up for a different category if you don't meet this description
  • 20 Mile Junior Race (Under 18 only!)
  • Men under 18 years old on race day
  • Women under 18 years old on race day
  • 30 Mile (8 Options, choose wisely!)

Open Men and Women

  • Master's Men and Women (age 45+)
  • Viejo Men & Vieja Women (age 60+)
  • Single Speed Men and Women (all ages)
  • 60 Mile Endurance (To REALLY earn that finish beer)

Open Men and Women

(all ages and gear combinations without motors)

Event Information:

• Waves start heading out at 9:00 AM. Riders must be on-site and ready to go by 8:15 AM. We won't wait for you!

• To reward current SDMB members and encourage new memberships, all CURRENT SDMB members get a $20 discount towards a 30 or 60 mile entry with the code "SDMB2021"! We're going with the honor system on this one, but will do random checks to make sure folks using the discount are actually members. Non-members who use the discount code will be barred from the race.

Need a membership? The annual membership is only $40/year so sign up now and get $20 off your entry fee (30 & 60 mile events only) plus get all the SDMB member perks as well...sign up on this website.

Still a member? Can't remember if you are still a member? Click here, then click on the light blues square on the top right of the page. Enter your information and you can check your membership status.

• Specific race information will be emailed to participants prior to the race.

• Youth ages 16 and under must be accompanied by a responsible adult.

• All entries include an awesome t-shirt, but only if you register before 11/17

• All entries also include a free finish beer (if you are of legal drinking age)!

• Camping!!! For 2021 we have a limited number of on-site tent and RV/trailer sites available (30' max length).

• No ebikes are allowed for this event.

WARNING - Prices increase $20 on 11/26 and you will miss out on the luxurious, soft, beautifully designed T-Shirt, so...

To be clear, this event is being put on independently of SDMB, and any affiliation or implied support by SDMB is coincidental. This event is solely operated by Dirty Bunny Outdoor Club, Inc. Event name, images and designs are being used with permission and are not property of Dirty Bunny Outdoor Club, Inc.

MotoSonoran Brewing Thirsty Thursday Fundraiser for SDMB

  • 13 Jan 2022
  • 6:00 PM - 9:00 PM
  • MotoSonoran Brewing

Come enjoy some great beer and support SDMB at the same time. We'll have a table with information about upcoming events, membership perks, and even get you signed up as a member if you are not already a SDMB member.

© 2018 - Sonoran Desert Mountain Bicyclists - SDMB - is a 501(c)3 non-profit organization

PO Box 65075, Tucson AZ 85718

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