Going ahead this Saturday
No cancellation listed for Saturday 31 October.
Parkrun
Brea Reservoir parkrun
A free, fun, and friendly weekly 5k community event. Walk, jog, run, volunteer or spectate – it's up to you!
-
United States
-
California
- 5 kilometres
- Brea Reservoir
Meeting point: 33.89312, -117.92688. The interactive map loads with JavaScript. Open the same point in OpenStreetMap.
Coordinates 33.89312, -117.92688.
The course
Course description
An out and back course on a mix of asphalt and packed dirt.
This course begins and ends on the Brea Reservoir dam wall.
Participants will run a near-loop to a halfway mark within view of the starting line. After turning around, they’d just retrace their steps back to the finish.
On the course
The course is 5k long. The course is at Brea Reservoir, Fullerton. The course is run entirely on permanent paths. Some sections of the course may accumulate mud, leaves and puddles after rain. Dependent on availability, marshals will be at key sections of the course, or signs will be in place.
Please remember that the parkrun uses shared paths. For the continued success of the event, please give way to other park users. This won't hurt your time, it won't stop you from getting a PB and it will make sure everyone continues to enjoy the event.
Please, wherever possible walk, jog, cycle or use public transport when attending the event. If you do have to drive, please consider car-sharing to reduce our impact on both the environment and other park users. Please also watch out for other park users when arriving and leaving. Parking may be limited so try to arrive early.
Facilities
Restrooms, parking.
More details
Public transport
Bus: The OC Bus 143 stops at the Harbor-Valencia Mesa intersection (stop 1815). The start/finish line is just a short walk from there.
On foot
The Brea Reservoir Dam Wall can be accessed via foot or bicycle just off the traffic circle on E Valencia Mesa Dr (at the Fullerton Tennis Center parking lot).
By road
If driving south or north on N Harbor Blvd, turn east onto E Valencia Mesa Dr. At the traffic circle, take the 1st exit into Youth Way driving south until reaching the Nursery School and YMCA parking lots.
Coffee
Every week we grab a post-parkrun coffee: Coffee Up Roastery. Please come and join us!
We're friendly
Every week we grab a post parkrun coffee at Coffee Up Roastery - please come and join us!
Course safety
Brea Reservoir parkrun is a fun, free event organised by volunteers for the benefit of everyone. We wish to make the event as safe as possible, so participants, spectators and helpers are asked to take care about the following:
- Please be considerate to the park and other park users at all times.
- Children under the age of eleven must be accompanied (within arm's reach) throughout the event by a parent, guardian or appropriate adult of the parent's choice.
- Please arrive by foot, by pedal-power or by public transport if you can - your efforts help to reduce our impact on the park and the planet.
- We invite everyone to consider volunteering at parkrun. Your support helps your parkrun events remain sustainable and free for all in your community, and it’s also a wonderful way to improve your own health and happiness. Please visit the volunteer page for more information.
- Take care near roads and car parks – some vehicles drive very quickly. Please congregate away from the cars and be careful in particular if you have children. If you’re driving to the event, please drive carefully.
- Take care on uneven surfaces – whether on grass or on tarmac. Watch out for cyclists, other participants, pedestrians, children, dogs, wildlife, park animals, vehicles, park maintenance work, falling branches, bollards, posts and other obstacles around the course.
- Please ensure that you are fit enough to walk, jog, run 5k (3.1 miles) with us.
- If you see someone with a serious problem, please stop to help them out and get help as soon as possible.
- If you’re watching, keep clear of participants on the course, and look after any children and dogs you may have with you.
- It is not permitted to run with a pushchair and a dog at the same time.
- Lyme Disease is a bacterial infection spread to humans by infected ticks. Consider protecting yourself by wearing repellent when at parkrun events in grassy or wooded areas. See lymediseaseuk.com for further details.
- You are welcome to take part with one dog by your side, within reach at all times, on a short, handheld, non-extendable lead. The use of waist harnesses is prohibited. Please also see this Support Site entry for further details about parkrunning with dogs.
- parkrunners pushing buggies are welcome, but please take care of others around you and do your best to start at an appropriate place in the field for your pace.
We hope these tips help to ensure that Brea Reservoir parkrun is fun and safe for everyone.
Age grading
All parkrun events use Age Grading to help parkrunners compare results.
parkrun events use Age Grading to help parkrunners see progress and compare results.
For more information, please see our Support page.
Volunteering
All parkrun events are organised by volunteers - email breareservoir@parkrun.com to help.
Safeguarding
parkrun is committed to safeguarding and promoting the welfare of children and adults at risk. For our full safeguarding processes and policies please see our Safeguarding Hub.
To report a safeguarding concern please email safeguarding@parkrun.com.
Event stats
- 79
- Events
- 1,388
- Finishers
- 2,693
- Finishes
- 129
- Volunteers
- 340
- Personal bests
- 210
- Groups
- 00:32:49
- Average finish time
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Challenges this parkrun helps with
- Alphabeteer Challenge Starts with B
- Stayin' Alive Starts with B (needed for Stayin' Alive)
- Periodic Table Matches symbols: Be, B, Br, Ba, Bi, Bk
Park5K is not affiliated with parkrun. - last updated 26 October 2026
Bushy parkrun