entrada
noun
en·tra·da
ə̇n‧ˈträdə,
en‧-
plural -s
: an expedition or journey into unexplored territory
before beginning the long entrada, the trappers killed three deer
R. G. Cleland
R. G. Cleland especially : a Spanish exploring or conquering expedition in America
through the many entradas and colonization attempts, to the final conquest after the great Maya revolt Science
Science nothing was left except the deeply engraved routes of their remarkable entradas Frank Waters
Frank Waters 
Word History
Etymology
Spanish, literally, entry, entrance, from feminine of entrado (past participle of entrar to enter), from Latin intratus, past participle of intrare to enter