Depends on how you define "successful."
His commander, Francisco Vasquez de Coronado, was searching for the Seven Cities of Gold -- which were never found. Cardenas was searching for a northern route as part of this journey -- and he failed in his assignment. Indeed, his discovery of the Grand Canyon was a huge disappointment for him, because he found it impossible to go any further north.
Was it a success to be the first European to see this? Three centuries later, the area was still considered a utterly worthless piece of land.
Captain Garcia Lopez de Cardenas.
It was Captain Garcia Lopez de Cardenas in 1540, but he never reached the Canyon's floor.
For Spain in 1540 it was Captain Garcia Lopez de Cardenas.
Captain Garcia Lopez de Cardenas of Spain.
In 1540 by Captain Garcia Lopez de Cardenas.
It was Captain Garcia Lopez de Cardenas.
No, it was Captain Garcia Lopez de Cardenas of the 1540 Coronado Expedition.
Captain Garcia Lopez de Cardenas of Spain in 1540.
The Spanish explorer Captain Garcia Lopez de Cardenas was the first European to discover the Grand Canyon. He discovered the canyon in 1540 while being guided by Hopi Native American guides.
Captain Garcia Lopez de Cardenas whose small party never reached the canyon floor.
John Wesley Powell explored the grand canyon
Coronado was seeking gold in the form of the Seven Cities of Cibola. He did not see the Grand Canyon, but a patrol commanded by Captain Garcia Lopez de Cardenas did.