Soon, she found herself on a dirt road.
"My thought was, 'Well, there are all these other cars in front of me, so it must be OK,' so I just continued," she told KMGH.
To make matters worse, weekend rains had transformed the dirt into mud. As a result, several cars slid or got stuck, Monsees said.
Monsees told CNN that she was able to escape the mess – and give two less fortunate travelers a lift – because her vehicle has four-wheel drive.
"The question is why did Google send us out there to begin with?" Monsees told KMGH of the road, which is privately owned, according to Aurora and Denver officials.
In a statement to ABC News, Google said it takes "many factors into account when determining driving routes."
"While we always work to provide the best directions, issues can arise due to unforeseen circumstances such as weather," the statement said. "We encourage all drivers to follow local laws, stay attentive, and use their best judgment while driving."
The company also said the road had not been listed as private, CNN reported.
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