The course
All three Ray Miller distances run in Point Mugu State Park in the western Santa Monica Mountains, starting and finishing at the Ray Miller Trailhead right next to the ocean. The terrain is classic Southern California coastal mountain: dry scrubland, sandstone, a mix of smooth singletrack and fire road, and long exposed ridgelines with big Pacific views. It goes up and down the whole time with almost no flat, roughly 14,000 feet of climbing on the 50 mile and about 6,000 feet on the 50K, and you give all of it back as descent.
It climbs from the first step
The race sends you straight up the entire Ray Miller Trail, over 1,000 feet in the first couple of miles, before you have even warmed up. That opening climb tells you how the whole day is going to go. You are almost never on flat ground out here, and your pace is going to swing hard between the ups and the downs.
The trap is treating that fresh-legged first climb as free speed. It is not. Climb it by effort, hike the steep pitches on purpose, and save your running legs for the rolling singletrack that comes after. Banking a little cushion is fine, but burning matches in the first hour is how people blow up on the back half.
Exposed ridgelines and the deceptive sun
A lot of this course runs on open, shadeless coastal ridgeline, the kind of dry scrubland where you can see the ocean for miles and there is nothing overhead to block the sun. December temperatures are usually mild, often in the 50s to mid 60s, which is the reason Ray Miller pulls in so many runners getting out of colder places. But mild air and nonstop sun still drains your electrolytes fast.
Finishers who have done it a few times describe Ray Miller turning into a salt-management problem on the exposed sections, some taking several salt sources every hour. Treat those open ridgelines as the place to be disciplined with sodium and fluid, not the place to relax, because the sun does its damage long before you feel it.
Sandstone Peak and the big middle climb
On the 50 mile, the big effort is the long climb up and over the Sandstone Peak high country in the middle of the course, a couple thousand feet of sustained climbing that, by most accounts, makes the earlier climbs look easy. You earn the high point, drop off the back, and then you have to climb again just to get out, all while the day is at its warmest and most exposed.
This is where the 50 mile gets decided, as much as anywhere does. Get to that middle climb with fuel in the tank and salt on board, keep your effort honest going up, and you set yourself up for a strong run home. Show up already empty and the rest of the day is just survival.
The descents, and the famous finish
Total descent equals total gain, so the downhills are the real crux of Ray Miller. The course is known for its singletrack, and the final three-mile descent down the Ray Miller Trail to the finish is some of the best trail in Southern California. It is also where trashed quads go to suffer. Runners who hammered the early descents get to that last drop with nothing left, and the ones who ran controlled get to actually enjoy it.
Quad-specific downhill training is the most race-specific work you can do for this course. Honestly, the climbs get respect on their own. The descents are what quietly separate the people who finish feeling strong from the ones limping in the last hour.
Aid stations and cutoffs
The course has full aid stations with water, electrolyte fluids, fruit, sandwiches, and snacks, and you can leave drop bags at the major checkpoints. The overall time limits are generous compared to a lot of mountain ultras. But Ray Miller runs strict mid-course cutoffs at the key aid stations, and missing one on the 50 mile can get you dropped to a shorter distance.
The exact aid mileages and cutoff clock times move around year to year, so pull the official cutoff chart for the current edition and build your pacing plan backward from those times, with a buffer. The constant climbing and the exposed sun both slow you down late, so bank a little margin while you are still fresh.
Pacing strategy for Ray Miller
A course that climbs and drops the whole time, out in the open sun, rewards patience and punishes ego. Pace Ray Miller by effort and by grade, not by the flat-ground numbers from your home training runs.
Pace the climbs by grade, not by clock
On a course this vertical, your pace is going to swing all over the place between the climbs and the runnable parts, and that is fine, that is how it should be. Power-hike the steep pitches and run the gentler grades. Trying to hold one steady minutes-per-mile number across this terrain is a quick way to cook yourself on the climbs, including the big Sandstone Peak effort, and have nothing left for the descents.
Use our free grade-adjusted pace calculator to turn your flat fitness into honest effort targets for the steep Ray Miller climbs, so you actually know whether you are pacing the vert sustainably or burning matches you are going to want at that final descent.
Protect your quads for the descents
The course loses exactly as much as it climbs, so downhill running is the real decider. Hold back on the early descents, run them light and controlled instead of letting gravity beat up your legs, and your back half will be a whole lot better. The runners who finish strong are usually the ones who still have working quads when they hit that last three-mile Ray Miller Trail drop.
To set a finish goal that actually accounts for all that vert, use our vert-aware race time calculator. It factors the climbing into your projected finish so you are not stuck on a flat-course estimate that the Santa Monica Mountains will quietly tear apart.
Reality-check your goal, then race the sun
If you want to know how your fitness from a recent race carries over to a hilly trail effort like this, our race equivalent calculator helps you reality-check your goal before you lock in a finish time. Then plan your day around the sun. Be conservative through the warmest, most exposed midday ridgeline hours, stay ahead on salt and fluid, and you will have the legs to run when everyone else is walking.
Whichever distance you pick, 50 mile, 50K, or 30K, the pattern is the same. Even effort on the climbs, controlled quads on the descents, and disciplined electrolytes on the exposed sections.
Fueling strategy for Ray Miller
A long day on exposed, sunny ridgelines makes fueling and hydration just as decisive as fitness. The sun on the open coastal scrub is the thing that empties out well-trained runners, so plan for it.
Carbs: ramp to the high end, on a trained gut
For an effort this long, aim for roughly 60 to 90 grams of carbohydrate per hour and lean toward the high end once your gut can handle it. Use a glucose-plus-fructose blend so you can absorb more than a single sugar lets you, and practice your exact hourly carb number on long training runs so 80 to 90 g/h feels normal on race day, not like an experiment.
The sun makes this harder, because a hot, sun-baked stomach takes less. That is one more reason to practice fueling in race-like conditions and to keep eating through the warm midday ridgeline hours, when your appetite drops off but your engine still needs the fuel.
Sodium and fluid: built for the exposed sun
On the open Santa Monica ridgelines, electrolyte loss runs high even when the air feels cool, and experienced Ray Miller finishers often take several salt sources per hour to keep up. Push your sodium toward the high end, carry enough fluid to get over the climbs between aid stations, and fill your bottles all the way up every chance you get. Cramping, a sloshy stomach, that wrung-out late-race feeling, those are usually fluid and sodium problems, not fitness problems.
Dial in a personalized plan with our free ultra fueling calculator. Enter your weight, your goal time, and the expected sun exposure, and it gives you a carb, sodium, fluid, and caffeine number per hour built for the Ray Miller duration and conditions. Then go test it in training.
This guide is for planning and training, and it reflects publicly available information about the Ray Miller 50/50. Race details, including the date, course, elevation totals, aid stations, and cutoffs, can change year to year. Always confirm the current specifics on the official Ray Miller 50/50 race website before you train or travel.