Abstract: Various embodiments of a stabilizer system for portable irrigation equipment are shown and described. Each embodiment includes a stabilizer which attaches to a vertical riser and has two legs that pivot independently to opposite sides of the main pipe of the irrigation line to be firmly planted on the ground for holding the riser upright to achieve optimum irrigation sprinkling. Preferably, the stabilizer attaches to the riser by means of a horizontal spring clip that frictionally engages the riser. Preferably, the two legs pivot about 180 degrees for making easier the installation and storage of the stabilizer and for making easier the moving of the irrigation lines. Optionally, the stabilizer system may include a retainer for holding the legs in a collapsed position close to the riser to make easier the moving and storing of the irrigation lines with the stabilizer remaining attached.