The accident happened at about 1:30 a.m. on South Clifton Road, near Gold Mine Road, according to the Frederick County Sheriff's Office.
It took rescue workers 47 minutes to free Mary Katherine "Kate " Curtis, 33, from an overturned white Ford Escort, which slid off the icy road onto the shoulder, struck a rock and started rolling, deputies said. As it was rolling over, the car struck and broke a utility pole, which fell onto the car, deputies said.
Curtis was flown by a Maryland State Police helicopter to University of Maryland Shock Trauma Center, deputies said.
She was in serious condition Sunday afternoon, according to a nursing supervisor.
A Middletown, Md., teenager was in critical but stable condition in Frederick Memorial Hospital Sunday following an ice-related accident Saturday afternoon, according to a hospital official.
Megan Wagner, 14, was a passenger in a 1995 Pontiac Grand Am that spun out of control when it struck ice on the ramp from Alt. U.S. 40 to Interstate 70, according to Maryland State Police in Frederick.
The car hit a guardrail, a sign post and a bridge pillar before stopping, troopers said.
The car's driver, John Wagner, 42, of 104 Cone Branch Drive, Middletown, Md., and 1-year-old passenger Samuel Wagner, of Middletown, were treated at Frederick Memorial Hospital and released, according to a nursing supervisor.
State police in Frederick handled numerous property damage accidents late Saturday morning and early Sunday, according to Cpl. Andrew Smith.
There were two accidents involving multiple vehicles, one on Md. 144 at the Monocacy River Bridge and one at Md. 144 and Interstate 70, Smith said.
Accident reports were not available Sunday, he said, so he couldn't say if anyone was injured in those accidents.
State police in Hagerstown handled one minor accident overnight Saturday and had no reported accidents on Sunday, according to Cpl. Rick Narron.
"Actually we were kind of lucky It's phenomenal, considering the roads," said Narron, who attributed the "luck" to light traffic.
The Washington County Sheriff's Department handled at least 10 accidents Saturday and Sunday, according to a dispatcher. Only one had reported injuries, he said.
There was a minor accident at the intersection of Summit Avenue and Howard Street at about 11 a.m. on Sunday, but no one was taken to the hospital, according to Hagerstown City Police.
Authorities in Berkeley County, W.Va., reported at least five accidents attributed to icy roadways Saturday night, resulting in injuries to three people.
A Martinsburg, W.Va., couple was taken to City Hospital after a 10:50 p.m. accident on Kelly Island Road. West Virginia State Police said Faye Stokes, 46, lost control of the vehicle and ran off the roadway.
She was treated for minor injuries at the hospital. Her passenger, Norman Stokes, 50, was admitted and was in good condition Sunday night.
Robert Schoo, 38, of Hedgesville, W.Va., was treated in the emergency room of City Hospital following a one-vehicle accident on W.Va. 45 near Martinsburg. State police said he was traveling west at 9 p.m. when he crashed.
At 9:30 p.m. on W.Va. 51 near Martinsburg, Keina Wilt, 18, of Charles Town, W.Va., was eastbound when she lost control on the icy roadway. State police said she was unhurt.
The Berkeley County Sheriff's Department investigated an ice-related two-vehicle accident at about 10 p.m. Saturday on W.Va. 51 West at Interstate 81. A dispatcher said there were no injuries.