A single-vehicle motorcycle crash left two riders with critical injuries Wednesday evening in the 2600 block of South Justen Road in unincorporated McHenry. | Photo: Alex Vucha / Lake and McHenry County Scanner.

A Wonder Lake woman and a McHenry man are both in critical condition after their motorcycle went off the roadway and rolled over in unincorporated McHenry, police said.

The McHenry County Sheriff’s Office and Nunda Rural Fire Protection District responded around 6:06 p.m. Wednesday to the 2600 block of South Justen Road in unincorporated McHenry for a report of a single-vehicle crash.

The Prairie Grove Police Department, McHenry Police Department, McHenry Township Fire Protection District, Cary Fire Protection District and Crystal Lake Fire Department were also called to the incident.

A preliminary investigation showed that a 2003 Harley Davidson motorcycle, driven by a 56-year-old McHenry man, was traveling northbound on Justen Road.

For unknown reasons, the man failed to navigate the curve in the road, resulting in the motorcycle leaving the roadway and crashing, according to the McHenry County Sheriff’s Office.

A single-vehicle motorcycle crash left two riders with critical injuries Wednesday evening in the 2600 block of South Justen Road in unincorporated McHenry. | Photo: Alex Vucha / Lake and McHenry County Scanner.

The 56-year-old man and a 50-year-old Wonder Lake woman, who was riding as a passenger, were both ejected from the motorcycle.

Both victims were transported by ambulance to Northwestern Medicine Hospital in McHenry.

The driver was later transferred to Advocate Condell Medical Center in Libertyville where he remains in critical condition.

The passenger was later transferred to Loyola University Medical Center in Maywood where she also remains in critical condition.

Neither rider was wearing a helmet at the time of the crash, the sheriff’s office said.

The investigation is ongoing by the McHenry County Sheriff’s Office Major Traffic Crash Investigation Unit.