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⏵ Course guide · California ultra

Rodeo Beach Trail Run 50K Course Guide

The Rodeo Beach Trail Run 50K is a steep, punchy coastal grinder in the Marin Headlands above Rodeo Beach and Fort Cronkhite, right on the black-sand coast just over the Golden Gate from San Francisco. It is a 20-plus-year Inside Trail fixture, and the trick to it is that the vert comes in short, sharp stabs on the SCA and Coastal trails, not one big mountain climb. I will walk you through the course first, then give you a pacing and fueling plan that fits all that up-and-down. Free calculators along the way let you dial in your own numbers.

⏵ At a glance

Rodeo Beach Trail Run 50K quick facts

Date
Early August (Saturday, August 1, 2026). Historically a December race, now run in August alongside the Headlands 100K
Location
Rodeo Beach / Fort Cronkhite, Marin Headlands, Golden Gate NRA, Sausalito, CA
Distances
50K (≈30.8 mi) · 30K (≈18.8 mi) · Half (≈13.4 mi) · 8K (≈4.8 mi)
Elevation gain
50K: about 5,750 ft · 30K: about 3,500 ft
50K start
7:00 AM (30K also 7:00 AM)
Cutoff
50K and 30K: 8.5 hr time limit, all runners off course by 3:30 PM
Qualifier
No Western States, UTMB, or Hardrock qualifier status listed by the race

These facts come from the official Inside Trail race site and UltraSignup. The race recently moved from December to early August, so double-check the current date, start times, cutoffs, and aid stations in the race-day details before you commit. Race logistics change year to year.

The course: where Rodeo Beach is won and lost

The 50K loops the Marin Headlands hills out of Rodeo Beach, about 30.8 miles with roughly 5,750 feet of climbing on a mix of singletrack and fire road. The signature stretches are the SCA Trail single-track and the Coastal Trail, with a swing past Pirates Cove and big views of the Pacific, San Francisco, and the Golden Gate Bridge. The shorter 8K, Half, and 30K all share the same kind of terrain.

The climbs: short, steep, and relentless

There is no single long climb to settle into here. Instead the course stacks up a long series of short, steep Headlands pitches, and the climbing basically never stops. That is the whole character of the race. If you treat every little climb like a race effort you will be cooked by halfway, so settle in early, power-hike the steep stuff without ego, and save your matches. The runners who do well here are the ones who stay patient on the ups for the first two-thirds and still have legs to run the back half.

Up on the ridgelines you are exposed to wind and sun with very little tree cover, and you get those huge ocean and Golden Gate views as a reward. The SCA Trail singletrack is the postcard section. Enjoy it, but keep your effort honest, because the next descent is coming fast.

The descents: free speed that wrecks quads

Every one of those steep climbs comes with an equally steep drop, and the descents are where you make up real time if your legs can take it. The footing is generally good but can get loose, rocky, or sandy on the steepest pitches near the coast, so quick feet matter. The danger is that all that downhill pounding adds up. Trash your quads early and the constant up-and-down of the last 10 miles turns into a grind.

Train downhill running specifically before this one. Being able to keep turning your legs over on the steep descents late in the race, when your quads are shot, is honestly what separates a strong finish from a survival shuffle to the beach.

Coastal weather and exposure

The Marin Headlands sit right on the Pacific, so the weather is the wild card, not the altitude. Summer mornings out here are often cool, gray, and socked in with fog, which feels great early but can hide how hard you are working and how much you are sweating. Then the marine layer burns off and you are suddenly out on exposed ridgelines in bright sun with almost no shade. Dress and fuel for both.

Inside Trail runs well-stocked aid stations along the course, so you are never desperately far from help, but the gaps still ask you to carry fluid and calories across the climbs. Do not coast on the cool air. Drink and eat on a schedule from the start.

Pacing strategy for a punchy, climb-heavy 50K

With about 5,750 feet of gain chopped into dozens of short steep climbs and descents, Rodeo Beach is all about managing effort, not chasing a flat pace. Run the climbs by feel and let the runnable ridges and descents be where you actually move.

Pace by grade, not by the watch

Your flat-ground pace is almost useless on this course because you are constantly going up or down. What matters is grade-adjusted effort: hold a steady output you can keep on the climbs, power-hike anything steep, and then open up on the descents and flatter ridge sections. The classic blowup here is hammering the early climbs because they are short and feel doable, then having nothing left for the relentless back half. Use a grade-adjusted pace to turn your real fitness into honest climbing and descending targets so you do not torch the first half.

Build a vert-aware finish prediction

Do not guess your Rodeo Beach finish off a road or flat-50K time. The 5,750 feet of punchy climbing and the steep descents add real time, and the 8.5 hour cutoff with a hard 3:30 PM sweep means you want to know your window before you start. A vert-aware finish prediction that accounts for this course profile gives you a realistic target and lets you work back into the cutoffs, so you actually know how much buffer you have instead of hoping.

⏵ Free tools to pace this course

Fueling strategy for the duration and the coast

Most runners are out on the Rodeo Beach 50K for somewhere around 4 to 8.5 hours, climbing the whole time, so your gut has to keep working. The cool coastal air can trick you into under-fueling, which makes a steady plan even more important than fitness.

Carbs: steady and trained

For a 4 to 8.5 hour effort, aim for around 60 to 90 grams of carbohydrate per hour, and only push the high end if your gut is trained for it. The constant climbing keeps your effort high and your stomach jostled, so keep your intake steady and easy to swallow rather than gambling on big late doses. Practice your exact race-day carb rate on hilly long runs so 80-plus grams an hour feels routine, not like an experiment you are running on race morning.

Sodium and fluid: do not get fooled by the fog

The marine layer makes Headlands mornings feel cool, so it is easy to drink too little and forget your salt. You are still sweating hard on the climbs, and once the fog burns off the exposed sun adds up fast. Plan your sodium for a real working effort, often around 400 to 700 milligrams per liter of fluid, and more if you are a heavy or salty sweater. Carry enough fluid to cover the climbs between aid stations. Weigh yourself before and after a hard long run to find your real sweat rate, then build the plan around your own number.

⏵ Build your fueling plan

Get a carb, sodium, fluid, and caffeine plan per hour built for your weight, your goal time, and this coastal grinder with the free ultra fueling calculator. Browse the rest of the free running tools at the tools hub.

⏵ Train for it with Summit Line

Get a race-day plan built around YOUR fitness, this exact Rodeo Beach course profile, and your projected splits. Summit Line reads your real training, builds a plan for all that punchy climbing, and rehearses your fueling so race day is something you execute, not guess at.

Start free →Explore the demo

Rodeo Beach Trail Run 50K FAQ

How hard is the Rodeo Beach Trail Run 50K?

It is harder than the mileage makes it sound. The 50K is roughly 30.8 miles with about 5,750 feet of climbing, and almost all of that vert comes in short, steep, punchy Marin Headlands pitches rather than one long mountain climb. You are basically doing repeats up and down coastal ridges on the SCA Trail and the Coastal Trail, so the climbing never really lets up. There is no altitude and no big alpine grind, but the relentless up-and-down and the exposed coastline chew up your legs, and the 8.5 hour cutoff keeps honest runners moving.

How much climbing is in the Rodeo Beach Trail Run 50K?

The 50K carries about 5,750 feet of total elevation gain over roughly 30.8 miles, per the Inside Trail course description. None of it is a single sustained climb. It is stacked into a lot of short, steep ups and equally steep downs as the course works the Marin Headlands hills above Rodeo Beach. The 30K is about 18.8 miles with roughly 3,500 feet of gain, the Half is about 13.4 miles with 2,450 feet, and the 8K is about 4.8 miles with 925 feet, so every distance here climbs hard for its length.

How should I fuel for the Rodeo Beach Trail Run 50K?

Plan it as a 4 to 8.5 hour effort with constant climbing, so your stomach has to keep working the whole time. Most runners do well on roughly 60 to 90 grams of carbohydrate per hour, leaning higher if your gut is trained for it. The coastal mornings here are often cool and foggy, which can mask how much you are sweating, so do not skimp on fluid or sodium just because you do not feel hot. Inside Trail aid stations are well stocked (gels, chews, waffles, chips, potatoes, Coke, Tailwind, fruit), but run your own numbers for your weight and goal time with the free ultra fueling calculator.

What are the cutoff times for the Rodeo Beach Trail Run 50K?

Both the 50K and the 30K share an 8.5 hour time limit, with all runners required to be off the course by 3:30 PM. The 50K and 30K start together at 7:00 AM. There can be intermediate aid-station cutoffs as well, so do not plan to bank all your buffer for the finish. Confirm the current aid-station cutoffs in the race-day details before you start.

What is the terrain and weather like at Rodeo Beach?

The course is classic Marin Headlands: a mix of singletrack and fire road on the SCA Trail and the Coastal Trail, with steep pitches, fast descents, and a swing past Pirates Cove, all on the black-sand coast at Fort Cronkhite. You get big Pacific views plus glimpses of San Francisco and the Golden Gate Bridge from the ridgelines. Coastal weather is the wild card: summer mornings are often cool, gray, and foggy, but the marine layer can burn off into bright, exposed sun with very little shade. Footing is generally good but can be loose or sandy on the steep bits.

Is the Rodeo Beach Trail Run 50K a good first 50K?

It is one of the more approachable Bay Area 50K options for a prepared first-timer, mostly because there is no altitude, the aid is good, and the shorter sister distances (8K, Half, 30K) let you build up on the same trails. That said, do not mistake approachable for easy. The 5,750 feet of punchy climbing and the steep descents will punish anyone who has not trained hills, and the 8.5 hour cutoff is firm. Train the short steep climbs and the downhills, rehearse your fueling, and most committed runners can finish comfortably inside the limit.

This guide is independent and for planning only. The course details, dates, cutoffs, and aid stations come from public sources and can change year to year, so confirm the current specifics with the official race before you register or run. The fueling and pacing advice is general and not medical advice.