Make breast cancer take a hike on September 23rd. HIKERS CHECK IN AT 8 A.M.

What better way to for you to bring to mind those who have experienced breast cancer and support ongoing efforts to make a difference than to participate in the Dipsea Hike for Zero Breast Cancer?

We are proud to partner with Every Body Walk!

Trailblazer Sponsors

Mountaineer Sponsors

Rock Climber Sponsors

Rambler Sponsors

Media Sponsors

THANK YOU! Online Registration Closed : Donations Thru October 31st!

See Hike Photos Here

Help reduce breast cancer risk in the next generation!

Zero Breast Cancer promotes breast cancer risk reduction through translation of scientific research and evidence-based recommendations that support health and wellness at key stages of life.


Researchers, doctors and breast cancer survivors know the importance of Rx Exercise in preventing, surviving and recovering from breast cancer! Read more here!

Do something good for yourself - hike or run a 6-mile trail loop on Mt. Tamalpais - starting and ending with the famous Dipsea steps.

Do something good for your community - raise funds to support breast cancer risk reduction outreach and education programs for teens.

Learn more at!





of your goal reached

InKind Supporters

Sponsor the Hike!

Your sponsorship;

  • means that every penny raised by the individual and team hikers goes to support breast cancer risk reduction educational programming.
  • shows your community how much you care about breast cancer risk reduction.

Zero Breast Cancer is a 501(c)(3) nonprofit organization (Tax ID: 68-0386016).

Download Sponsorship Form Here!

FAQs - Frequently Asked Questions

If you have a question that is not addressed here, please contact us at (415) 507-1949 or

How do funds raised make an impact?

Zero Breast Cancer is committed to sharing evidence based, scientifically valid current information about environmental and life-style risk factors for breast cancer. Awareness about the protective value of healthy lifestyles and habits, as well as education about toxins in our environment, are relevant to people of all ages and stages in our community. We believe it is sensible to start this conversation as early as possible and repeat it as oftern as possible. Since our founding 21 years ago Zero Breast Cancer has paid particular attention to the youth and teens in our community - both as research participants and consumers of research results. An excellent example of this is the seminal CYGNET study in which ZBC was the community partner to researchers at the Kaiser Permanente Division of Research in Oakland, CA. 

We know that in many high schools breast cancer awareness clubs emerge in response to students experienceing members of their families receiving breast cancer diagnoses and the challenges that arise during and after treatment.  The students in these clubs are eager to help.  We are a vital resource to them.

What are the entry fees and fundraising goals?

Registration Fees cover essential Hike day costs and are non tax-deductable:

Solo Adults - $20
Solo Students - $18
Team Members All Ages - $15
Kids under 11 yrs old - FREE

Fundraising is an essential part of the experience of the Dipsea Hike for Zero Breast Cancer and it is how you and/or your team make an impact on educating the next generation of young people about breast cancer risk reduction. 

Fundraising goals:

  • 1 person: $150
  • 2 – 5 people: $750
  • 6 – 10 people: $1,500
  • 11 – 15 people: $2,500
  • 16 – 20 people: $5,000
All donations to individual hikers or teams of hikers are fully tax-deductable as allowed by law. 
Zero Breast Cancer is a 501(c)(3) nonprofit organization (Tax ID: 68-0386016).

How do I set up and customize my individual fundraising page?

 Find 5 easy steps on how to get going here!

How do I create a team?

When you login to register, you will have the option to create a team. Once the team is created, other members can register and join the team by searching for the team name. Set up your team profile page by following the 6 easy steps here!

How do I record and submit offline donations?


Online donations are strongly preferred as they are immediately attributed to the individual or team that the donor is supporting.  Your help in encouraging online donations helps Zero Breast Cancer focus on our mission and our program and reduces the amount of administration needed to support this event.  Thank you for your help and understanding!

When your family, friends, neighbors and co-workers make an online donation they can opt out of receiving emails from Zero Breast Cancer and we will fully respect their privacy.  They will receive an online acknowledgment of their donation for their records of course!

If your supporters would prefer to make a donation by check please encourage them to mail the check directly to

Zero Breast Cancer
ATTN: Dipsea Hike
30 North San Pedro Road, Suite 160
San Rafael, CA 94903

Please NoteChecks should be made out to Zero Breast Cancer and your name/the name of your team should be in the memo line.  That way the donation can be properly validated and credited

Cash donations cannot be accepted directly by ZBC.  If your supporters wish to give you cash please follow the steps above and send us a check made out for the amount of cash you have received.  You will be credited with this donation and a tax-receipt issued to you.

Your fundraising page makes it easy to record all check/cash donations and track your fundraising goal!  Its all explained in 4 easy steps here!

Thank you for submitting offline donations to Zero Breast Cancer regularly and in a timely manner!

What should I wear and bring?

  • Comfortable athletic shoes. Hiking shoes or boots are best. Make sure they are broken in.
  • Dress for weather. Select clothes with synthetic fabrics. Avoid cotton fabrics.
  • Hat with a brim.
  • Water bottles. Fill them up at home. There will be water at the aid stations and there are a couple water fountains along the course.
  • We will get you going with a snack and have lunch for you at the end but bring extra food just in case...
  • Sunscreen, lip balm, sunglasses.
  • Medications
  • Cell phone.

What is the location and route?

Starts and Finishes in:
Old Mill Park, Mill Valley, CA 94941

From Old Mill Park (Cascade Dr) go up the famous Dipsea Steps to the Dipsea Trail.

Cross Panoramic Hwy and follow the Sun Trail to the German Tourist Clubtake the Redwood Trail to the Panoramic Trail until you reach the Mt. Home Inn on Edgewood Ave.

Continue down Edgewood Ave to take either the: 

  • TENDERFOOT TRAIL to the Cypress Trail back down the Dipsea Steps, leading to the finish in Old Mill Park. (approx 6.29 mi - see map)
  • PIPELINE TRAIL back down the Dipsea Steps, leading to the finish in Old Mill Park. (approx 5.35 mi - see map)

NOTE: Along the course you will encounter rocky dirt trails and residential areas. Please be aware of your surroundings and pay attention for cars, bicyclists and other hikers. There are no shuttles back to the starting line.

Download the course map

Parking and Park/Trail Rules

There is no designated parking. Limited street parking is available in the surrounding neighborhood. Carpooling is strongly encouraged. Mill Valley parking meters are active 7 days a week. [NOTE: The START and FINISH are in: Old Mill Park, Mill Valley]

 **The Mill Valley Police Department has requested that participants of our event do not park at the Mill Valley Public Library. Please help us keep our annual permit by heeding this request.

Keep it clean!

Our goal is to minimize our impact on the park and the trail.  Together we can make this happen by minimizing use of plastic water bottles, make use of the bins provided, separate out compostable, recyclable and landfill items and each take responsibiity for our own waste.  Thanks you for caring for our environment.

SORRY.  No Pets or Strollers

The CA State Park does not allow dogs on the trails we are using for the Dipsea Hike. The trails are NOT stroller accessible. If you are bringing a young child; we suggest using a child carrying pack or baby carrier.


Contact us!

ZERO BREAST CANCER                                                       PHONE 415.507.1949  
30 North San Pedro Rd, Ste 160                                                                   
San Rafael, CA 94903