Motorcycle crash statistics and hotspots in San Marcos, CA
- motorcycle crashes, 2021–2026
- 152
- motorcycle crashes, 2021–2026
- serious or fatal
- 37
- serious or fatal
- fatal
- 4
- fatal
- street with the most
- SR-78
- street with the most
Where they cluster
All 10 spots, explained- 1SR-78 & Las Posas Rd16 crashes · 3 serious or fatalPolice reports: in 3 of 16, a driver drifted out of the lane or onto the wrong side.
- 2SR-78 & Las Posas Rd8 crashes · 2 serious or fatalFalls and fixed objects
- 3SR-78 & Rancho Santa Fe Rd4 crashes · 2 serious or fatalClose passes and cars turning alongside
Is San Marcos safe to ride a motorcycle?
This page covers traffic crashes, not crime. 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. What the records show: 152 motorcycle crashes were reported in San Marcos from 2021–2026, 37 of them serious or fatal (4 fatal). The most were at SR-78 & Las Posas Rd (16). 26% involved no other vehicle, usually running wide or losing grip. 14% involved a car turning left across the rider.
Where to look next
How motorcyclists crash in San Marcos
- 26% involved no other vehicle, usually running wide or losing grip.
- 14% involved a car turning left across the rider.
- 23% happened after dark.
What the reports show about motorcycle crashes in San Marcos
- 23% (California: 25%) of crashes happened after dark.
- 100% (California: 80%) were on roads posted 40 mph or faster.
- 24% (California: 28%) left someone seriously hurt or killed.
- The busiest hour was 5 p.m. (California: 5 p.m.).
- 2% (California: 2%) were on a wet road, as the report records it.
- The reports name something about the road itself in 4 crashes: a construction or repair zone (4).
Set against all motorcycle crashes in California, 2021–2026. Without traffic counts these can't say how risky a street is.
Where motorcycle crashes cluster
Spots with 3 or more reported crashes within about 250 m, worst first.
- 0116 crashes · 3 serious or fatal
SR-78 & Las Posas Rd
Close passes and cars turning alongside
Police reports: in 3 of 16, a driver drifted out of the lane or onto the wrong side. 7 of 16 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.
- 028 crashes · 2 serious or fatal
SR-78 & Las Posas Rd
Falls and fixed objects
4 of 8 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.
- 034 crashes · 2 serious or fatal · 1 fatal
SR-78 & Rancho Santa Fe Rd
Close passes and cars turning alongside
2 of 4 crashes were sideswipes: a vehicle alongside, typically a close pass, a right hook, or an opening car door. 50% 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.
- 045 crashes · 1 serious or fatal · 1 fatal
SR-78 & Woodland Pkwy
Riders hit from behind
3 of 5 crashes were rear-end: hit from behind. 60% 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.
- 055 crashes · 1 serious or fatal
San Marcos Blvd & Rancho Santa Fe Rd
Side-impact crashes at the junction
Police reports: in 3 of 5, a driver didn't yield while turning left. 4 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. 60% happened after dark.
- Cover your brakes through the junction and watch the front wheels of cars waiting to pull out or turn left. Drivers misjudge how fast a motorcycle is coming.
- Wear bright or reflective gear and use your high beam where you can.
- 064 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.
- 074 crashes · 1 serious or fatal
Rancho Santa Fe Rd & Lodgepole Rd
Side-impact crashes at the junction
Police reports: in 2 of 4, a driver didn't yield while turning left. 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. 50% happened after dark.
- Cover your brakes through the junction and watch the front wheels of cars waiting to pull out or turn left. Drivers misjudge how fast a motorcycle is coming.
- Wear bright or reflective gear and use your high beam where you can.
- 084 crashes · 1 serious or fatal
Mission Rd & Liberty Dr
Side-impact crashes at the junction
Police reports: in 2 of 4, a driver didn't yield while turning left. 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.
- Cover your brakes through the junction and watch the front wheels of cars waiting to pull out or turn left. Drivers misjudge how fast a motorcycle is coming.
- 095 crashes
SR-78 & Rancho Santa Fe Rd
Riders hit from behind
Police reports: in 2 of 5, a driver drifted out of the lane or onto the wrong side. 2 of 5 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.
- 103 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.
Streets with the most motorcycle crashes in San Marcos
| Street | Crashes | Serious/fatal |
|---|---|---|
| SR-78 | 63 | 14 |
| San Marcos Blvd | 15 | 5 |
| Mission Rd | 10 | 3 |
| Rancho Santa Fe Rd | 10 | 1 |
| Twin Oaks Valley Rd | 7 | 1 |
| Borden Rd | 3 | 2 |
| Los Vallecitos Blvd | 3 | 0 |
Reported motorcycle crashes, 2021–2026, counted by the street each police report names first, so a crash at a corner counts toward one of its two streets. Long, busy streets collect more crashes partly because more people use them.
What the police reports say drivers did in San Marcos
| A driver… | Crashes | |
|---|---|---|
| drifted out of the lane or onto the wrong side | 12 | |
| didn't yield while turning left | 12 | |
| didn't yield pulling out of a driveway or alley | 5 | |
| started or backed up when it wasn't clear | 4 | |
| turned or changed lanes when it wasn't clear | 4 | |
| ran a red light | 4 | |
| drove too fast for conditions | 3 | |
| ran a stop sign or didn't yield after stopping | 3 |
The other vehicle, where the report names one: 64 cars, 20 SUVs, 17 pickup trucks and 3 truck or semis. In 2 crashes the report says the other driver had been drinking or was on drugs.
Reported motorcycle crashes, 2021–2026. The officer names one party and one Vehicle Code section as the main cause of each crash; these are the crashes where that party was a driver. It is the officer's reading at the scene, not a court's finding, and many reports name the person on foot or on a bike instead, which we don't list.
Motorcycle crashes in San Marcos by year
| Year | Crashes | Serious/fatal | |
|---|---|---|---|
| 2021 | 18 | 7 | |
| 2022 | 22 | 5 | |
| 2023 | 35 | 10 | |
| 2024 | 31 | 7 | |
| 2025 | 28 | 3 | |
| 2026to Oct 19 | 18 | 5 |
2026 runs to Oct 19, the newest report in the data, and police reports keep arriving for months, so it isn't a full year.
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 16 reported motorcycle crashes from 2021–2026, 3 of them serious or fatal. Next are SR-78 & Las Posas Rd (8) and SR-78 & Rancho Santa Fe Rd (4).
- How many motorcyclists were killed in San Marcos?
- 4 crashes killed someone in 152 reported motorcycle crashes in San Marcos from 2021–2026, and 37 left someone seriously hurt or killed.
- How do motorcyclists usually crash in San Marcos?
- 26% involved no other vehicle, usually running wide or losing grip. 14% involved a car turning left across the rider. 23% happened after dark.
- When and where do motorcycle crashes happen in San Marcos, compared with California?
- Of 152 reported motorcycle crashes in San Marcos from 2021–2026: 23% (California: 25%) of crashes happened after dark. 100% (California: 80%) were on roads posted 40 mph or faster. 24% (California: 28%) left someone seriously hurt or killed. The busiest hour was 5 p.m. (California: 5 p.m.). 2% (California: 2%) were on a wet road, as the report records it. The reports name something about the road itself in 4 crashes: a construction or repair zone (4).
- Which streets in San Marcos have the most motorcycle crashes?
- By the street each police report names first, 2021–2026: SR-78 (63), San Marcos Blvd (15), Mission Rd (10), Rancho Santa Fe Rd (10), Twin Oaks Valley Rd (7). Long, busy streets collect more crashes partly because more people use them.
- How many motorcycle crashes happen in San Marcos each year?
- Reported motorcycle crashes with map locations: 2021: 18, 2022: 22, 2023: 35, 2024: 31, 2025: 28, 2026 (through Oct 19): 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. A report with no coordinates is placed at the intersection its street names give; reports with neither are not counted, so the real totals are higher.
Nearby cities
Source: California Crash Reporting System (CCRS), 2021–2026. A report with no coordinates is placed at the intersection its street names give; reports with neither are not counted, 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 2026-10-22. How the data works.