This is the 706th most frequent Spanish word.
larga
"Long."
Here, 'larga' is used as an adjective to describe the length of the road, referring to its physical extent.
La carretera es muy larga.
The road is very long.
Here, 'larga' modifies 'jornada', meaning a prolonged or extensive trip or task.
Nos espera una larga jornada hacia las montañas.
We have a long journey ahead to the mountains.
In this sentence, 'larga' describes the story, indicating its duration or amount of detail.