20-Week Santa Clarita Marathon Training Plan

The 2026 Santa Clarita Marathon is scheduled for November 15, 2026, so the 20-week window opens around June 28, 2026. Treat that as the outside edge of the window, then line week one up with the plan's normal weekly rhythm.

Use the longer window to make the early build calmer, not to add five months of hard training. The plan should begin close to your current load, hold most running easy, and delay the biggest race-specific work until the middle of the cycle. 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.

Build general durability first. Add the race's hills, flat sustained running, downhill exposure, heat, or humidity in layers after the weekly rhythm is stable, then make the final long runs the most course-specific. Two things separate Santa Clarita from a normal road marathon: you spend it on a narrow bike path with almost nobody around, and you drink from cupless dispensers. Train for both. The physical demand is a mild rolling course. The harder preparation is running a marathon-effort long run with no crowd, no pace group and nobody within sight.

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.

Small. About 204 runners finished the marathon in 2025, with 191 in 2024 and 137 in 2023. It is a genuinely low-key race run on car-free paseos and bike path, so expect long stretches alone rather than a crowd. For a certain kind of runner that is exactly the appeal.

Seven hours, which the race describes as about 15 minutes per mile plus. Marathon runners can also request a 6 a.m. early start in advance, an hour before the main 7 a.m. gun, though water stations are not fully operating until 6:30 so early starters should carry fluid.