12-Week Avenue of the Giants Marathon Training Plan

The 2027 Avenue of the Giants Marathon is scheduled for May 2, 2027, so the 12-week window opens around February 7, 2027. Treat that as the outside edge of the window, then line week one up with the plan's normal weekly rhythm.

Use this window when your recent training is steady and the opening week will not be a mileage jump. If you are returning after a long break, twelve weeks is too little room to rebuild and peak at the same time. The course does not change the opening load you can handle, so choose from your current mileage and recent longest run before adding race-specific terrain.

Course-specific work starts early in a 12-week build. Put the race's terrain and expected conditions into long runs once the opening weeks feel controlled, without adding extra hard days. Train for Avenue of the Giants by rehearsing pace without a watch. The old growth canopy blocks GPS in places, so build long runs where you cover the middle miles on perceived effort alone and check the clock only at known mile marks. That habit is worth more here than any hill session.

Do not double weeks or cram missed mileage into the remaining calendar. Use your current mileage, recent longest run, experience, goal, and available days to choose a plan that can enter at an appropriate point while preserving the taper.

Not physically. Total climbing is about 695 feet across 26.2 miles and the net change is 6 feet, with the organizers describing only one significant hill. The difficulty is psychological. It's a double out and back, so you cover the same stretches of road twice and pass the start area mid-race.

The old growth redwoods along the course stand around 300 feet tall, and the organizers warn that they sometimes block satellite signal on running watches. Expect your pace and distance readings to drift. Run the middle of the race on effort and use the course mile markers to check yourself instead of trusting the watch.