Bike crashes on Harbor Blvd, Costa Mesa

We don't rate streets as safe or unsafe: crash counts can't say how risky a street is, and busy streets have more crashes partly because more people use them. This page covers traffic crashes, not crime. What the records show: 41 bike crashes were reported on Harbor Blvd in Costa Mesa from 2021–2025, 5 of them serious or fatal. The most were at Harbor Blvd & Hamilton St (4). 39% were side-impact crashes at junctions (drivers pulling out or turning across). 12% happened after dark.

• 39% were side-impact crashes at junctions (drivers pulling out or turning across).
• 12% happened after dark.

Set against all bike crashes in California:

• 12% (California: 21%) of crashes happened after dark.
• 12% (California: 15%) left someone seriously hurt or killed.
• The busiest hour was 11 a.m. (California: 3 p.m.).

1. Harbor Blvd & Hamilton St

   4 crashes · 1 serious or fatal

   Side-impact crashes at the junction

   2 of 4 crashes were broadside: a vehicle hit at an angle, usually a driver pulling out of a side street or driveway, turning across, or running the signal.

   • Slow down approaching the junction, watch drivers' front wheels at side streets and driveways, and don't assume a driver waiting to turn has seen you.
   See it on the map

2. Harbor Blvd & Wilson St

   5 crashes

   Side-impact crashes at the junction

   2 of 5 crashes were broadside: a vehicle hit at an angle, usually a driver pulling out of a side street or driveway, turning across, or running the signal.

   • Slow down approaching the junction, watch drivers' front wheels at side streets and driveways, and don't assume a driver waiting to turn has seen you.
   See it on the map

3. Harbor Blvd & Bernard St

   3 crashes · 1 serious or fatal

   A mix of crash types

   • No single crash pattern stands out here. Slow down, stay visible, and leave extra room.
   See it on the map

4. Harbor Blvd & Mesa Verde Dr East

   4 crashes

   Side-impact crashes at the junction

   3 of 4 crashes were broadside: a vehicle hit at an angle, usually a driver pulling out of a side street or driveway, turning across, or running the signal.

   • Slow down approaching the junction, watch drivers' front wheels at side streets and driveways, and don't assume a driver waiting to turn has seen you.
   See it on the map

5. Harbor Blvd & Fair Dr

   4 crashes

   Side-impact crashes at the junction

   2 of 4 crashes were broadside: a vehicle hit at an angle, usually a driver pulling out of a side street or driveway, turning across, or running the signal.

   • Slow down approaching the junction, watch drivers' front wheels at side streets and driveways, and don't assume a driver waiting to turn has seen you.
   See it on the map

6. Harbor Blvd & Harbor Center

   4 crashes

   Side-impact crashes at the junction

   2 of 4 crashes were broadside: a vehicle hit at an angle, usually a driver pulling out of a side street or driveway, turning across, or running the signal.

   • Slow down approaching the junction, watch drivers' front wheels at side streets and driveways, and don't assume a driver waiting to turn has seen you.
   See it on the map

Spots with 3 or more reported crashes within about 250 m, worst first.

The busiest hour was 11 a.m..

Where on Harbor Blvd do the most bike crashes happen?

Harbor Blvd & Hamilton St, with 4 reported bike crashes from 2021–2025, 1 of them serious or fatal. Next are Harbor Blvd & Wilson St (5) and Harbor Blvd & Bernard St (3).

How do cyclists usually get hit on Harbor Blvd?

39% were side-impact crashes at junctions (drivers pulling out or turning across). 12% happened after dark.

When do bike crashes happen on Harbor Blvd, compared with California?

Of 41 reported bike crashes on Harbor Blvd in Costa Mesa from 2021–2025: 12% (California: 21%) of crashes happened after dark. 12% (California: 15%) left someone seriously hurt or killed. The busiest hour was 11 a.m. (California: 3 p.m.).

How many bike crashes happen on Harbor Blvd each year?

Reported bike crashes on Harbor Blvd in Costa Mesa: 2021: 8, 2022: 4, 2023: 10, 2024: 11, 2025: 8. The latest year can rise as late reports come in.

Where does this data come from?

Police crash reports in the California Crash Reporting System (CCRS), published by the state on data.ca.gov, counted by the street each report names first. Only crashes reported with map coordinates are counted, so the real totals are higher.