A pothole, a sunken patch or a broken pavement edge can throw a cyclist with no car anywhere near. Claims like these are part of our pedestrian and bicycle accident practice, and they follow a different path from a crash with a driver. The claim runs against the government body that owns or controls the road, only on the grounds the Government Code allows, and it starts with a written claim due within six months instead of the usual two years.

This guide explains who answers for a road defect in Sonoma County, what the law requires a cyclist to prove, how to show the agency knew, and where the claim goes. For the same rules applied to drivers and public vehicles, see our guide on crashes involving a public vehicle or a dangerous road.

How does a pothole claim work, step by step?

  1. Find out who owns the road. A county road, a city street and a state highway each belong to a different public entity, and the claim must go to the right one.
  2. Preserve the evidence fast. Photograph and measure the defect before it is patched, and keep the bike, helmet and clothing as they are.
  3. Present a written claim within six months. A claim for an injury must reach the public entity no later than six months after the crash (Government Code 911.2), and it must state the facts Government Code 910 lists, including the date, place and circumstances.
  4. Wait for the entity to act. The entity has 45 days; if it does nothing, the claim is treated as rejected on the last day (Government Code 912.4).
  5. File suit on time. After a written rejection notice, a lawsuit generally must be filed within six months of the date the notice was delivered or mailed; without a written notice, the limit is two years from the crash (Government Code 945.6).
  6. Prove the elements. In court, the cyclist must prove the elements of a dangerous condition claim described below (CACI 1100).

Who owns the road, and where does the claim go?

Where you crashedWho may be responsibleWhere the claim goes
A county road in an unincorporated areaCounty of SonomaOn the County's claim form, by U.S. mail or in person, to the Clerk of the Board of Supervisors, 575 Administration Drive, Suite 100A, Santa Rosa, CA 95403
A street inside a city (Santa Rosa, Petaluma, Cotati and others)That cityThe city's own claims office; our guide on filing claims lists each city's office
A state highway, claim of $12,500 or lessCaltransForm DOTLD-0274 to the Caltrans District 4 Claims Office, P.O. Box 23660, Oakland, CA 94623-0660 (510-286-5806); no filing fee
A state highway, claim over $12,500Caltrans (State of California)The Department of General Services' Government Claims Program, P.O. Box 989052, MS 414, West Sacramento, CA 95798-9052, with a $25 fee or a fee waiver request (Government Code 911.2(b))
A recreational trail or an unpaved road to a recreation areaGenerally no public entity, because of an immunitySee "What changes the answer?" below (Government Code 831.4)
A utility trench, steel plate or driveway apron owned by someone elseThe private owner or contractor, and possibly the public entity tooAgainst a private party, no government claim and the two-year limit (Code of Civil Procedure 335.1); any claim against the entity still needs the six-month claim

The County says that after the Clerk receives a claim, it goes to Risk Management for investigation, the claimant gets an acknowledgment letter with a claim number, and a notice follows when the investigation ends; status questions go to Risk Management at 707-565-2705. Each step for cities and the State, including what to do when you are not sure who owns the road, is covered in how to file an injury claim against a city, county or the State.

When is a pothole a "dangerous condition" under the law?

A public entity is not liable for every flaw in the pavement. A "dangerous condition" is one that creates a substantial risk of injury, as distinguished from a minor, trivial or insignificant risk, when the road is used with due care in a reasonably foreseeable way (Government Code 830(a)). Riding a bike on a public road is a foreseeable use, so the question is whether the defect posed a substantial risk to a careful rider.

A court can decide as a matter of law that a defect was too minor to count, viewing the evidence most favorably to the injured person (Government Code 830.2). Size matters, but so do the surroundings: shade, a curve, a downhill approach, or a defect sitting right where cyclists must ride. Our guide on what makes a defect trivial explains that defense. Our guide on what makes public property legally dangerous covers the broader test.

The jury instruction adds a point that helps cyclists: whether the road was in a dangerous condition is decided without regard to whether the injured person used reasonable care (CACI 1102). The rider's own care matters later, when responsibility is divided, not when deciding whether the hole was dangerous.

How do I show the County or city knew about the pothole?

The law gives two routes. One is that a public employee's negligent or wrongful act within the scope of the job created the condition, such as a patch left uneven after utility work (Government Code 835(a)). The other is notice: the entity knew, or should have known, of the condition long enough before the crash to protect against it (Government Code 835(b)). "Protect against" includes repairing it, putting up a safeguard, or warning of it (Government Code 830(b)).

Notice can be actual, meaning the entity knew of the condition and knew or should have known it was dangerous (Government Code 835.2(a)). It can also be constructive: the condition existed long enough, and was obvious enough, that the entity should have found it with due care. On that question, the evidence can include whether a reasonably adequate inspection system would have found it, and whether the entity ran its inspection system with care (Government Code 835.2(b)). A public entity knows of a condition if an employee knew and reasonably should have told the entity (CACI 1103).

Records can supply that proof. The County's website points people reporting roadside debris or damage to SoCo Connect, its online system for service requests, photos and progress tracking; the County notes that requests are handled during business hours, not around the clock. Reports, work orders and patching logs are public records that any person has a right to inspect, except where the law exempts them (Government Code 7922.525). After a request for copies, the agency must decide within 10 days whether it has disclosable records and say when they will be available, with up to 14 more days in unusual circumstances (Government Code 7922.535).

Can the County say the crash was my fault?

It can try, and comparative fault applies. If the entity proves the cyclist was negligent and that the negligence was a substantial factor in the harm, the cyclist's damages are reduced by that percentage (CACI 405). When a driver also played a part, the jury assigns percentages to everyone, and they must total 100 percent (CACI 406).

The Vehicle Code helps riders here. A cyclist may leave the right edge of the road to avoid surface hazards (Vehicle Code 21202(a)(3)) and may leave a bike lane to avoid debris or other hazardous conditions (Vehicle Code 21208(a)(3)). A rider who swerved around one hole and hit another was doing what the law allows. Lighting matters after dark: a bike needs a front white light and rear red reflector or light under Vehicle Code 21201(d), and an entity may argue a missing light kept the rider from seeing the hole. If a car was also involved, our guide on who is at fault when a car hits a cyclist explains the driver's side.

The state counts bike crashes of every kind: in 2023 Sonoma County had 94 bicyclists killed or injured, ranking 18th of 58 counties in the Office of Traffic Safety's rankings, where 1 means the highest, or worst. Those figures do not separate out road defects. The county offices that handle reports, claims and lawsuits are on our page about injury cases in Sonoma County.

What changes the answer?

The crash was on a trail or an unpaved access road. A public entity is not liable for injuries caused by the condition of an unpaved road that gives access to recreation areas, or of any trail used for those purposes; for a paved trail, walkway or path on an easement that leads to unimproved property, the immunity holds only if the entity reasonably tries to warn of hazards (Government Code 831.4).

The road was built to an approved design. An entity may raise design immunity (CACI 1123). But a decision the Judicial Council quotes under CACI 1126, a case that involved a bike lane that ended, says public entities must provide a warning when they know or should know an approved roadway design presents concealed dangers. CACI 1126, new in November 2024, lists what a cyclist must then prove.

The six months have passed. A written application for leave to present a late claim can be made within a reasonable time, no later than one year after the crash, stating the reason for the delay and attaching the proposed claim (Government Code 911.4). Time while the injured person was a minor still counts toward that year (Government Code 911.4(c)(1)).

The defect belonged to someone else. Easements and encroachments on public land that the entity does not own or control are not public property (Government Code 830(c)). When a private owner or contractor controls the defect, the claim against them is an ordinary negligence claim (Civil Code 1714(a)).

The rider was on a scooter or e-bike. The same dangerous condition rules apply, but the riding rules differ; see e-scooter injuries and who is responsible. E-bike riders should also read our guide on e-bike class, age and helmet rules.

What could this look like? An example

For example, imagine a cyclist riding a county road west of Santa Rosa late on an October afternoon, with a front light on. A deep pothole sits in tree shade at the bottom of a short hill, right where riders keep to the right edge. The front wheel drops in, and the rider breaks a collarbone.

A friend photographs and measures the pothole the next morning, before it is patched. The rider confirms the road is maintained by the County, not a city, and mails a claim on the County's form to the Clerk of the Board within two months. A records request turns up earlier service requests about the same spot. The County acknowledges the claim, then sends a written rejection 40 days later. The rider now has six months from that notice to sue in Sonoma County Superior Court (Government Code 945.6), where the earlier reports support notice (Government Code 835.2(a)) and the County may argue the rider was riding too fast for the light (CACI 405). This example is made up to show how the rules fit together; it says nothing about any real case.

What mistakes do people make after a pothole crash?

  • Waiting for the bruises to heal before photographing the hole, and finding it patched.
  • Sending the claim to the wrong agency, such as the County for a city street.
  • Assuming the two-year limit applies, and missing the six-month claim.
  • Calling to complain instead of presenting a written claim on the entity's form.
  • Leaving out the date, place and circumstances that Government Code 910 requires.
  • Throwing out the bent wheel, which can show how deep the defect was.

What should I do this week?

  1. Get medical care and describe every symptom, including any blow to the head.
  2. Photograph the defect from several angles with a ruler or coin for scale, and record the exact location.
  3. Keep the bike, helmet, lights and clothing as they are.
  4. Find out whether the road is a county road, a city street or a state highway.
  5. Write the six-month claim date on your calendar; see California personal injury deadlines.
  6. Request the agency's records on the location: complaints, service requests and repair logs.
  7. If a lawsuit becomes necessary, read what to expect at Sonoma County Superior Court.

Frequently asked questions

Can I sue the County for a pothole bike crash?

Yes, if the pothole was a dangerous condition and the County created it or had notice in time to fix it (Government Code 835). The written claim must come first, within six months (Government Code 911.2).

Does it matter that I did not see the pothole?

Not to the question of whether the road was dangerous, which is decided without regard to the rider's care (CACI 1102). It may come up later, when fault is divided (CACI 405).

How small is too small?

There is no fixed measurement. A court asks whether the risk was so minor that no reasonable person would see a substantial risk to a careful user, looking at the surrounding circumstances (Government Code 830.2).

What if a car hit me after I swerved around the pothole?

Both the driver and the public entity may share responsibility, with percentages assigned to each (CACI 406). The claim against the entity still needs the six-month written claim.

Where do claims about a state highway in Sonoma County go?

Caltrans lists Sonoma County in its District 4. Claims of $12,500 or less go to the District 4 Claims Office in Oakland; larger claims go to the State's Government Claims Program.

Can I report a pothole to the County?

Yes. The County's site sends people reporting roadside debris or damage to SoCo Connect, and an emergency should go to 911. A report made after your crash does not prove earlier notice, but it creates a record of the location.

If a pothole or broken road caused your bike crash in Sonoma County, contact Young Law Group today at (707) 343-0556 or through our contact page for a free consultation.

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