At Augusta National, nobody is allowed to measure the greens. Every other major publishes its green speeds; Augusta never has, so every number you’ve heard, twelve to fifteen feet, is a guess. One rater estimated twelve by counting the steps players took walking across a green, because he wasn’t allowed to roll a ball.
The Stimpmeter is a thirty-six-inch aluminum bar invented by Edward Stimpson and handed to courses by the USGA in 1978. By the USGA’s own scale, American greens run about seven to twelve feet, with twelve already labeled tournament-grade. After the 1980 Masters, Augusta tore out its Bermuda greens and rebuilt all eighteen in bentgrass, almost no grain, lets a ball run, debuting in 1981. Add mowing, rolling, chasing the water out, and a SubAir system that pulls moisture on command, and the estimates climb off the end of the scale.
The greens are so steep, designed by Alister MacKenzie, that the standard Stimpmeter can barely read them, which is why the USGA redesigned it in 2012 with a shorter 2X notch. The silence is the strategy. There’s no speed limit in golf, and the USGA’s own booklet says the Stimpmeter isn’t intended for course comparisons. Release nothing, and the legend can’t be matched. Your own superintendent, by contrast, will tell you his green speed if you ask, because he’s protecting living grass, not a myth.