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Data last rebuilt 2026-09-22

Motorcycle crash hotspots in San Marcos, CA

63 motorcycle crashes were reported in San Marcos from 2021–2025, 15 of them serious or fatal (2 fatal). Below are the spots where they keep happening, what usually goes wrong at each one, and what to watch for.
motorcycle crashes, 2021–2025
63
motorcycle crashes, 2021–2025
serious or fatal
15
serious or fatal
fatal
2
fatal
These numbers are too low for San Marcos. Only 41% of the motorcycle crashes reported here have a map location. The rest come from police reports sent to the state without coordinates, so they're missing from the map and from the counts on this page.
Open San Marcos on the map

Is San Marcos safe to ride a motorcycle?

We don't rate cities 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. The records for San Marcos are also incomplete: only 41% of its reported motorcycle crashes have a map location, so the numbers here are too low. What the records show: 63 motorcycle crashes were reported in San Marcos from 2021–2025, 15 of them serious or fatal (2 fatal). The most were at SR-78 & Las Posas Rd (9).

How motorcyclists crash in San Marcos

  • 27% involved no other vehicle, usually running wide or losing grip.
  • 25% happened after dark.

Where motorcycle crashes cluster

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

  1. 019 crashes · 2 serious or fatal

    SR-78 & Las Posas Rd

    Close passes and cars turning alongside

    6 of 9 crashes were sideswipes: a vehicle alongside, typically a close pass, a right hook, or an opening car door. Traffic is posted at about 65 mph.

    • Don't linger in drivers' blind spots, and watch for cars changing lanes or turning into driveways alongside you.
    • Traffic is fast here: at this speed you cross a junction in about a second, so scan early.
    See it on the map
  2. 027 crashes · 2 serious or fatal

    SR-78 & Las Posas Rd

    Falls and fixed objects

    4 of 7 crashes were a fall or hitting an object, with no other vehicle involved. Traffic is posted at about 65 mph.

    • Enter slower than feels necessary and watch for gravel, sand and diesel. Look through the bend.
    • Traffic is fast here: at this speed you cross a junction in about a second, so scan early.
    See it on the map
  3. 033 crashes · 2 serious or fatal · 1 fatal

    SR-78 & Rancho Santa Fe Rd

    Close passes and cars turning alongside

    2 of 3 crashes were sideswipes: a vehicle alongside, typically a close pass, a right hook, or an opening car door. 67% happened after dark. Traffic is posted at about 65 mph.

    • Don't linger in drivers' blind spots, and watch for cars changing lanes or turning into driveways alongside you.
    • Wear bright or reflective gear and use your high beam where you can.
    • Traffic is fast here: at this speed you cross a junction in about a second, so scan early.
    See it on the map
  4. 044 crashes · 1 serious or fatal

    SR-78 & San Marcos Blvd

    Riders hit from behind

    4 of 4 crashes were rear-end: hit from behind. Traffic is posted at about 65 mph.

    • Check your mirrors when slowing, flash your brake light, and leave an escape gap when you stop in traffic.
    • Traffic is fast here: at this speed you cross a junction in about a second, so scan early.
    See it on the map
  5. 053 crashes · 1 serious or fatal

    SR-78 & Twin Oaks Valley Rd

    Close passes and cars turning alongside

    2 of 3 crashes were sideswipes: a vehicle alongside, typically a close pass, a right hook, or an opening car door. Traffic is posted at about 65 mph.

    • Don't linger in drivers' blind spots, and watch for cars changing lanes or turning into driveways alongside you.
    • Traffic is fast here: at this speed you cross a junction in about a second, so scan early.
    See it on the map
  6. 063 crashes · 1 serious or fatal

    SR-78 & Twin Oaks Valley Rd

    Close passes and cars turning alongside

    3 of 3 crashes were sideswipes: a vehicle alongside, typically a close pass, a right hook, or an opening car door. Traffic is posted at about 65 mph.

    • Don't linger in drivers' blind spots, and watch for cars changing lanes or turning into driveways alongside you.
    • Traffic is fast here: at this speed you cross a junction in about a second, so scan early.
    See it on the map
  7. 074 crashes

    SR-78 & Rancho Santa Fe Rd

    Riders hit from behind

    2 of 4 crashes were rear-end: hit from behind. Traffic is posted at about 65 mph.

    • Check your mirrors when slowing, flash your brake light, and leave an escape gap when you stop in traffic.
    • Traffic is fast here: at this speed you cross a junction in about a second, so scan early.
    See it on the map
  8. 084 crashes

    SR-78 & Twin Oaks Valley Rd

    Falls and fixed objects

    2 of 4 crashes were a fall or hitting an object, with no other vehicle involved. Traffic is posted at about 65 mph.

    • Enter slower than feels necessary and watch for gravel, sand and diesel. Look through the bend.
    • Traffic is fast here: at this speed you cross a junction in about a second, so scan early.
    See it on the map
  9. 093 crashes

    SR-78 & Woodland Pky

    Riders hit from behind

    2 of 3 crashes were rear-end: hit from behind. 67% happened after dark. Traffic is posted at about 65 mph.

    • Check your mirrors when slowing, flash your brake light, and leave an escape gap when you stop in traffic.
    • Wear bright or reflective gear and use your high beam where you can.
    • Traffic is fast here: at this speed you cross a junction in about a second, so scan early.
    See it on the map
  10. 103 crashes

    SR-78 & Nordahl Rd

    Riders hit from behind

    3 of 3 crashes were rear-end: hit from behind. Traffic is posted at about 65 mph.

    • Check your mirrors when slowing, flash your brake light, and leave an escape gap when you stop in traffic.
    • Traffic is fast here: at this speed you cross a junction in about a second, so scan early.
    See it on the map

Motorcycle crashes in San Marcos by year

YearCrashesSerious/fatal
202174
202262
2023164
2024162
2025183

Common questions about San Marcos

Where do the most motorcycle crashes happen in San Marcos?
The worst spot is SR-78 & Las Posas Rd, with 9 reported motorcycle crashes from 2021–2025, 2 of them serious or fatal. Next are SR-78 & Las Posas Rd (7) and SR-78 & Rancho Santa Fe Rd (3). These counts are too low for San Marcos: only 41% of its reported motorcycle crashes have a map location.
How many motorcyclists were killed in San Marcos?
2 crashes killed someone in 63 reported motorcycle crashes in San Marcos from 2021–2025, and 15 left someone seriously hurt or killed. These counts are too low for San Marcos: only 41% of its reported motorcycle crashes have a map location.
How do motorcyclists usually crash in San Marcos?
27% involved no other vehicle, usually running wide or losing grip. 25% happened after dark.
How many motorcycle crashes happen in San Marcos each year?
Reported motorcycle crashes with map locations: 2021: 7, 2022: 6, 2023: 16, 2024: 16, 2025: 18. 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. Only crashes reported with map coordinates are counted, so the real totals are higher.

Nearby cities

VistaEscondidoCarlsbadEncinitasOceansideSolana BeachSanteeTemecula

Source: California Crash Reporting System (CCRS), 2021–2025. Only crashes reported with map coordinates are counted, and many city police reports have none, so these numbers are lower than the real total. Freeway crashes are included: many motorcycle crashes in cities happen on them. Busy streets show more crashes partly because more people use them. Data last rebuilt 2026-09-22. How the data works.