A conduit stake has three slender ribs, a cap upon the ribs, a head upon the cap, a slot in the head, and a hook extending outwardly from the head opposite the slot. The three ribs have a common point and extend upwardly therefrom in a cross section similar to the letter Y up to the cap. The first rib of the three has at least three notches oriented to grasp soil and gravel particles so that the stake resists withdrawal. The head has a thickness, or height, above the cap at least three times the thickness of the cap. The slot has a shape and orientation to admit a ferrous tab plate for later detection and location of the invention when concealed by gravel, other aggregate, or soil. Outwardly from the head, the hook extends a sufficient reach to admit a conduit and then turns downwardly.