Major Traffic Disruption from Collision with Boulder

Traffic Collision on State Route 140 in Mariposa Causes Delays Today

📍 Mariposa, CA

📅 Published: October 3, 2025 at 11:31 AM

🔄 Updated: October 3, 2025 at 12:30 PM

Map showing the location of the accident in Mariposa, CA
Mariposa, October 3, 2025 -

A traffic collision on State Route 140 at E Whitlock Road in Mariposa, CA, caused significant traffic disruptions today. The incident occurred around 10:41 AM when a vehicle collided with a boulder that had come onto the roadway. This collision blocked the westbound lane, resulting in delays for drivers during the morning commute.

Emergency traffic management units responded promptly to the scene to manage the situation. A tow truck was dispatched to remove the vehicle involved in the collision, which was successfully towed away by 11:48 AM. By 11:56 AM, the roadway was cleared, allowing traffic to resume normal flow.

Motorists experienced congestion and backups as the incident unfolded, but the swift response from emergency services helped to minimize delays. Traffic management units worked diligently to ensure the area was safe and that vehicles could navigate through without further issues.

Drivers are reminded to stay alert while driving, especially in areas where debris may be present. This incident highlights the importance of road safety and awareness, particularly during adverse conditions.

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