I was tooling around with Google Earth, and was playing with the measurement tool to see how long the walk is on various courses. Some I've played, others I haven't.
As I was doing these, I noticed how a fair amount of courses were almost exactly 4.5 miles to walk, (clubhouse to course back to clubhouse). I'm not sure how accurate the tool is, but at least the differential ratios from course to course should be good. Additionally the actual walk of the course would probably be longer due to "right, left" military style golf, that is unless you are a "Fred Funk"-ish straight hitter. Here is a list of the courses I took a look at in order of shortest to longest:
1) Indian Canyon in Spokane WA - 4.2 miles - This was the shortest, but don't let the yardage fool you as you must walk up and down the canyon 4 times during the round. A golden age course.
2) Cypress Point - 4.3 miles - What a routing. Hard to really add anything here other than if you haven't read Geoff's book on the course, then beg, borrow, or steal to get a copy.
3) NGLA - 4.4 miles - A great use of the land in TOC style.
4,5) ANGC & Shinnecock Hills - 4.6 miles - So far all these courses are pre-1930's? Are there any long courses from this era? Over 5 or even 5.5 miles?
6,7) Pacific Dunes, Bandon Trails - 4.7 miles - Right there in the same ballpark as most of these. Is the 4.5 mile mark a magic number in golf course design or does it just work out this way? Bandon Dunes was slightly longer at 4.8.
And then there are the beasts....Coming in at number
8 ) Circling Raven - Worley, Idaho - 6.4 miles - Wow what a huge jump in mileage. More than 40% longer than the 4.5 mile standard
9) South Mountain - Draper, Utah - 6.6 miles - Crazy long and mountain cart ball track. Even Tiger would be insane to try to walk this...but wait...
Rounding out the top 10:
10) The Ranch Club - San Jose, CA - 7.4 miles - Holy cow!! And once again this is if you played straight down the fairways and didn't lose a ball. This comes in at 65% longer than the other courses.
I know this was a random sampling of courses..but it begs the question: Is this a chicken and egg thing? Are courses getting longer because we have carts, or did the introduction of carts mean that previously non-doable sites were now doable?