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⏵ Course guide · Catalina Island

Avalon Benefit 50 Mile Course Guide

The Avalon Benefit 50 Mile and 50K send you the length of Catalina Island on its interior fire roads, from Avalon out to Two Harbors and back. On paper it looks runnable, and then the rolling climbs and the shadeless ridges start to add up on you. I will walk you through how the course is built, where it is won and lost, and how to pace and fuel it.

⏵ Quick facts

Avalon Benefit 50 at a glance

Date
Saturday, January 9, 2027
Location
Avalon, Catalina Island, California
Distances
50 Mile and 50K
Surface
Mostly fire road, some paved sections, exposed
Climbing
Substantial for both: published figures put the 50 mile near 8,000 ft and the 50K around 6,500 ft
Cutoff
5:00 PM finish deadline (50 mile starts 5:00 AM, 50K at 6:00 AM)
Qualifier
Not currently a Western States qualifier; verify the current list before relying on it
Field
Small, classic, and popular: the oldest ultra trail run in California, routinely full with a waitlist

The course

Both distances start in Avalon and head into the island interior on fire roads that are normally closed to the public. The 50 mile is an out-and-back to Two Harbors at the far end of the island, and the 50K is a shorter loop through Avalon Canyon, Airport Road, and the ranches. The footing stays easy the whole way (fire road plus some pavement, not technical single track), so what makes it hard is the climbing, the long gaps between aid, and the exposure. Not the surface.

The fast first half lies to you

Running out from Avalon toward the far side of the island feels quick, and the early miles will tempt you to bank some time. Resist it. The course is one long string of rolling fire-road climbs and descents instead of one decisive mountain, so you pay for every climb late. The people who blow up out there are almost always the ones who ran the opening third like a road race.

The interior is open and there is no shade. Even in a January race the ridges and the warmer canyons (Middle Ranch runs several degrees hotter than the coast) can cook you if you do not respect the sun, so treat the exposed stretches as a place to manage your fluid and your effort, not a place to push.

Two Harbors and the climb out is the crux

On the 50 mile, the turnaround at Two Harbors is the hinge of the whole race, your head and your legs both. The runner reports all say the same thing: the climb leaving Two Harbors is the hardest part of the day, a grind that seems to go on forever, and it hits you at the exact moment your legs stop being fresh. Get there with something left and you will reel people in. Get there spent and the back half turns into a survival march.

From there the route rolls back across the interior and piles on more gain before the finish. The closing miles drop off the ridge on a long, steep paved descent into Avalon, a quad-trashing, toe-jamming downhill that is brutal on legs already 47 miles deep. Trained downhill quads matter here just as much as your climbing fitness.

Aid is spread out, so carry accordingly

Aid stations on the 50 mile sit several miles apart (runner accounts describe roughly 4 to 7 mile spacing), and the manned one near the middle of the course is the station you pass twice. Put that spacing together with the exposure and the move is simple: carry enough fluid and fuel to cover the longest gap in the heat of the day, and do not try to run aid-to-aid on a thin margin.

And always check the current aid-station map, mileages, and any mandatory checkpoints on the official race site, because the course can get moved around year to year for weather or construction.

Pacing strategy

Avalon wears you down with climbing on ground that wants to be run, so your pacing problem is restraint, not speed. The job in the first half is to bank effort, not time. Hike the steep pitches efficiently, and keep enough in your quads for that final paved plunge into town.

Run by effort and grade, not by pace

Because the course rolls the whole time, your minute-per-mile number is going to swing all over the place between the climbs and the descents, and chasing a flat target pace is exactly how people over-cook the climbs early. Pace the ups by effort and power-hike the steep ones the second hiking is faster than shuffling. To turn your flat-ground fitness into honest climbing splits, run your numbers through our free grade-adjusted pace calculator so you know what each pitch should really cost you.

And on a course with this much vert, a flat-road equivalent is going to lie to you and make you think you are faster than you are. Use our vert-aware race-time calculator to fold the roughly 6,500 to 8,000 feet of climbing into a finish-time prediction, then build your cutoff cushion off that number, not off your road 50K pace.

Protect the back half and the final descent

Plan the day in halves. Get to Two Harbors (or the 50K turnaround) feeling like you are working but still comfortable, and then let the second half be where you actually spend it. The climb out of Two Harbors and the late canyons are where places change hands, and the runner who held back over the first 25 miles is the one still moving well out there.

Train your downhill and respect it. The closing paved descent into Avalon will shred quads that are not ready, so do real downhill work in your build and ease into that descent instead of hammering it from the top. And if you are sizing this race up against another distance you already know, our race-equivalent calculator helps you set a sane goal off a result you actually trust.

Fueling strategy

This is a long, exposed, sea-level day, so your fueling job is steady carbohydrate plus heat-aware hydration and sodium. There is no altitude to deal with here, but the missing shade on the interior makes fluid and salt the two things most likely to end your race early.

Ramp carbs with your finish time

Set your carbs by how long you will be out there. Most runners do well on roughly 60 to 90 grams per hour, and you lean toward the high end the longer the day runs, think 8 to 12 hours on the 50 mile. But you do not just get to the top of that band for free. It takes a glucose-plus-fructose blend and a gut you have actually trained to absorb it, so rehearse the exact products and the exact hourly number on your long runs and never on race morning.

Plug your body weight, goal time, and the Catalina forecast into our free ultra fueling calculator and it will turn all of that into a real carb, fluid, sodium, and caffeine plan per hour.

Treat hydration and sodium as the limiter

Even in January, the shadeless ridges and the warmer interior canyons pull real sweat out of you, and those long gaps between aid stations punish anyone who under-carries. Dial your fluid to your own measured sweat rate instead of some fixed rule, and keep sodium in the 300 to 700 mg per liter range, biased high if you are a heavy or salty sweater. When people cramp or feel wrung out late on this course, it is usually a fluid-and-salt problem, not a fitness one.

And because aid is several miles apart, leave every station carrying enough to cover the next gap with margin, and top your fluid off hard before the most exposed stretches.

⏵ Free tools for this race

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Avalon Benefit 50 FAQ

How hard is the Avalon Benefit 50 Mile?

This one will trick you. The footing is easy almost the whole way (fire road with some pavement, not technical single track) and the first half running from Avalon toward Two Harbors feels fast, so you think you signed up for a cruise. You did not. The hard part is the rolling climbing that never lets up and the exposure, and with published figures near 8,000 feet of gain over 50 miles and barely any shade on the interior ridges, the back half is where the day actually gets decided. The climb out of Two Harbors and the late canyons are the real test, not the dirt under your feet.

How much climbing is in the Avalon 50 Mile and 50K?

Both distances climb way more than the easy footing makes you expect. Published figures put the 50 mile around 8,000 feet of total gain and the 50K around 6,500 feet, and the exact number moves depending on the source and the year. None of it is one giant mountain pass. It is rolling and it adds up, so instead of one big crux it just keeps chipping at your legs all day long.

How should I fuel for the Avalon 50?

Plan for a long, exposed day at sea level. Your carbs should go up the longer you are out there, so figure roughly 60 to 90 grams of carbohydrate per hour for most runners and lean higher the slower you finish. The interior ridges and Middle Ranch Canyon run warm and have no shade, so take your hydration and sodium seriously even in January. Dial fluid to your own sweat rate and keep sodium in the 300 to 700 mg per liter range. Honestly the easy move is to run your weight, goal time, and the forecast through our free ultra fueling calculator and let it hand you the hourly plan.

What are the cutoff times for the Avalon Benefit 50?

Both events share a 5:00 PM finish deadline. The 50 mile starts at 5:00 AM, which gives you about a 12-hour window, and the 50K starts at 6:00 AM. On the 50 mile that means you need to hold a bit under a 14.5 minute per mile average to beat the cutoff, and that average has to swallow your aid-station stops and all that climbing too. So it is tighter than it sounds. Always check the current intermediate and finish cutoffs on the official race site before race day.

Is the Avalon 50 a good first ultra?

It is one of the friendlier 50 milers in California because the surface is non-technical fire road and the whole thing is contained on the island, so the logistics stay simple. But the climbing and the exposure are real, and the day rewards people who actually did their long runs and rehearsed their fueling. The 50K is very runnable and a strong pick for a first ultra. The 50 mile is a fair step up, and you want a base of long trail days under you before you toe that one.

What is the terrain like on Catalina Island?

The route runs the interior of Catalina on fire roads that are normally closed to the public, with big Pacific Ocean and cove views and stretches of pavement near the start, the ridge, and the final drop into Avalon. It is open and exposed and there is barely any shade, so out here the wind and the sun matter more than rock and roots. And the famous closing miles are a long, steep, quad-trashing paved descent straight into the finish.

Course details come from the official race site and public runner reports, and they can change year to year for weather or construction. Climbing figures vary by source. Always check the current date, distances, cutoffs, and aid-station map on the official Avalon Benefit 50 site before you make any race-day decisions. This guide is general strategy, not medical or coaching advice.