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The San Diego 50 Course Guide

The San Diego 50 is the early-January 50-miler around Lake Hodges in the San Dieguito River Park, and it has a reputation as one of the friendlier first 50s out there: an out-and-back on rolling double track and single track, more than 5,000 feet of climbing spread out instead of stacked, and one real climb at Raptor Ridge you get to hit twice. I will walk you through the course first, then give you a pacing and fueling plan that fits the distance and the January sun. There are free calculators along the way to dial in your own numbers.

⏵ At a glance

The San Diego 50 quick facts

Date
Saturday, January 9, 2027 (early-January weekend)
Location
San Pasqual Valley Staging Area, Escondido, around Lake Hodges in the San Dieguito River Park, San Diego County, CA
Distances
50 Mile, Trail Marathon, Heavy Half, plus shorter 10M / 5M / 5K options
Elevation gain
50 Mile: more than 5,000 ft over the out-and-back; high climb is Raptor Ridge near mile 5
50 Mile start
6:00 AM PST (Trail Marathon 7:00 AM, Heavy Half 8:00 AM)
Cutoff
All distances must finish by 8:00 PM, which is a 14-hour limit for the 50 Mile
Qualifier
No Western States, UTMB, or Hardrock qualifier status listed by the race

These facts come from the official race page and public race reports. Check the current date, start time, cutoffs, and aid stations in the race-day details before you commit. Race logistics change year to year, and a recent edition was cancelled, so confirm it is on.

The course: where The San Diego 50 is won and lost

The 50 is an out-and-back around Lake Hodges in the San Dieguito River Park, roughly 50 miles with more than 5,000 feet of climbing on a mix of double track, single track, fire road, and a little pavement. You start in San Pasqual Valley, roll a couple of miles through farmland to the Coast to Crest Trail, and the whole route you run out is the same route you run home. That symmetry is a gift: you get to scout every climb on the way out before you face it tired on the way back.

Raptor Ridge: the one real climb, and you hit it twice

The signature feature is Raptor Ridge, a short steep ascent of about three-quarters of a mile near mile 5. It is the high point of the day and the hardest single climb on the course, and because the race doubles back you climb it going out and again coming home with 40-plus miles in your legs. Hike it efficiently the first time. There is nothing to prove on a mile-5 climb in a 50-miler, and the smart play is to power-hike the steep part, keep your heart rate calm, and save the effort for later.

On the way back Raptor Ridge is also where pacers are allowed to join for the final 7 miles, so if you have a friend they can pick you up right at that aid station for the push to the finish. Knowing that climb is coming late, and that help is waiting there, is a good thing to keep in your back pocket when the day gets long.

The runnable middle: long, rolling, and a place to be patient

Most of this course is genuinely runnable. Long stretches of near-level double track along the lake, the single track of the North Shore Lake Hodges trail overlooking the water, gentle rolling grades that let you settle into a rhythm. This is where a 50-miler is actually won: not by hammering, but by holding an easy, repeatable effort for hours without surging. The flatter and faster it feels, the more disciplined you have to be, because banked time early gets paid back with interest in the last 10 miles.

There are a few rougher pinches mixed in, most notably the Del Dios Gorge, which gets rocky and steep, and some switchbacking sections that break up the flow. None of it is technical-mountain hard, but tired ankles and a long day make even moderate footing matter, so keep your feet quick and your attention up when the trail turns rocky.

The back half: the heat, the sun, and the long way home

The turnaround sits near the halfway point, and from there it is the same trail in reverse, which sounds easy and is not. By late morning the open San Pasqual Valley can climb from the mid-60s toward 80, and there is very little shade out there. The miles that felt cruisy on the way out get longer and hotter on the way back, and the final return over Raptor Ridge lands right when you are most cooked. This is the stretch where badly paced runners unravel, so the whole first half is really about arriving here with legs and a stomach that still work.

Aid stations sit roughly every five miles, with several crew-accessible points, so you are never far from a refill. Use them. Top off fluid, take in calories, dump water on your head if it is hot, and keep moving. The cutoff is a generous 14 hours, so you do not need to be fast, you need to be steady and to keep eating when the heat tries to kill your appetite.

Pacing strategy for a runnable, out-and-back 50

Because so much of The San Diego 50 is runnable, the temptation is to run all of it, and that is the trap. With more than 5,000 feet of climbing and a hot back half, this race rewards patience early and punishes ego. Run the first half like you are trying to feel fresh at the turnaround.

Bank effort, not time

On a fast, rolling course it is easy to look at a generous cutoff and a flat profile and decide to push the early miles. Do the opposite. Hold an easy, conversational effort for the entire first half, power-hike the climbs even when they feel small, and let the course come to you. The runners who finish strong here are the ones who get to mile 25 thinking they went out too slow. Use a grade-adjusted pace to set honest effort targets on the climbs and the rolling stretches so your flat-ground speed does not trick you into burning matches you will want later.

Build a finish prediction you can pace against

Do not guess your San Diego 50 time off a road marathon or a shorter trail race. Fifty miles, the cumulative 5,000-plus feet of climbing, and the midday heat all add real time, and a 50-miler is its own animal. A vert-aware finish prediction gives you a realistic window and lets you work backward into a sane first-half split and a target at the turnaround, so you actually know whether you are on pace or overcooking it long before the wheels come off.

⏵ Free tools to pace this course

  • Grade-adjusted pace calculator to turn your flat fitness into honest effort targets for Raptor Ridge and the long rolling miles.
  • Race-time calculator for a vert-aware finish prediction on this course, so you can plan a smart turnaround split against the 8:00 PM cutoff.
  • Race-equivalent calculator to turn a recent race result into a San Diego 50 goal you can actually hold for 50 miles.

Fueling strategy for a long day in the open sun

Most runners are out on The San Diego 50 for somewhere between 8 and 14 hours, much of it in exposed, warming valley sun. Over a day that long, the runners who finish well are almost always the ones who kept eating and drinking, so carbohydrate, sodium, and fluid matter as much as fitness does.

Carbs: steady, trained, and protected from the heat

For an effort this long, aim for roughly 60 to 90 grams of carbohydrate per hour, and only push the high end if your gut is trained for it. The thing that wrecks people here is not the terrain, it is stopping eating when the heat kills their appetite in the back half. Keep your intake steady and simple from the very first hour, alternate gels or chews with whatever real food the aid stations have that sits well, and practice your exact race-day carb rate on hot long runs so 80 grams an hour feels routine, not like a gamble.

Sodium and fluid: plan for warm, exposed miles

With the open valley sun and possible high-70s heat, lean toward the higher end on sodium, often around 500 to 700 milligrams per liter of fluid, and more if you are a heavy or salty sweater. Aid is roughly every five miles, but carry enough fluid to stay ahead of thirst between stops instead of arriving empty and parched, especially in the hot midday stretch on the way home. Weigh yourself before and after a warm long run to find your real sweat rate, then build the plan around your own number rather than a generic guess.

⏵ Build your fueling plan

Get a carb, sodium, fluid, and caffeine plan per hour built for your weight, your goal time, and the San Diego sun 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 San Diego 50 course profile, and your projected splits. Summit Line reads your real training, builds a plan for the distance and the climbing, and rehearses your fueling so race day is something you execute, not guess at.

Start free →Explore the demo

The San Diego 50 FAQ

How hard is The San Diego 50?

The San Diego 50 is on the friendlier end of 50-milers, which is exactly why it gets recommended as a good first 50. It is an out-and-back around Lake Hodges in the San Dieguito River Park with more than 5,000 feet of climbing over the 50 miles, mostly on rolling double track and single track rather than one big mountain. The hardest single climb is Raptor Ridge, a short steep ascent near mile 5 that you hit twice, and the rest is a lot of runnable trail with a few rocky, steep pinches like the Del Dios Gorge. The 14-hour cutoff is generous, so for a prepared runner this is more about staying steady and managing the January sun than surviving brutal terrain.

How much climbing is in The San Diego 50?

The 50-mile course has more than 5,000 feet of total elevation gain, spread out across the out-and-back instead of stacked into one climb. The signature climb is Raptor Ridge, described as roughly a three-quarter-mile ascent near mile 5, and because the course doubles back you climb it on the way out and again on the way home. Most of the rest is gently rolling, with a few short rocky and steep sections like the Del Dios Gorge and the North Shore Lake Hodges single track. It adds up over 50 miles, but no single hill is going to wreck you.

What are the cutoff times for The San Diego 50?

All distances have to be finished by 8:00 PM. The 50 Mile starts at 6:00 AM, so that works out to a 14-hour overall limit, which is roomy for the terrain. The shorter races start later in the morning and share the same 8:00 PM hard close. Always confirm the current start time and any intermediate cutoffs in the official race-day details before you commit, since logistics can shift year to year.

Is The San Diego 50 a good first 50-miler?

Yes, it is one of the more popular choices for a first 50-mile race. The climbing is moderate and spread out, a lot of the course is runnable double track, it is an out-and-back so you see the whole route twice, and the 14-hour cutoff gives you real margin. The catch is the distance itself plus the January sun: it can start in the mid-60s and climb toward 80 by midday with very little shade in the San Pasqual Valley. Train your long runs, rehearse your fueling, and respect the heat, and this is a fair place to step up to 50.

What is the terrain and weather like at The San Diego 50?

The course is a mix of double track, single track, fire road, and a little bit of pavement through the San Dieguito River Park around Lake Hodges. The first couple of miles roll through an agricultural valley before you reach the Coast to Crest Trail, then you get Raptor Ridge, long runnable stretches along the lake, the single track of the North Shore trail, and the rockier Del Dios Gorge. January weather in San Pasqual Valley is usually mild but can warm up fast in the open sun, sometimes into the high 70s or low 80s by early afternoon, with wind on the exposed ridges. There is not much shade, so heat is the main variable.

Can I have a pacer and drop bags at The San Diego 50?

For the 50 Mile, pacers are allowed for the last 7 miles, picking up at the Raptor Ridge aid station, so you can grab a friend for the final push home. Drop bags are allowed too, though the race notes they will not be mailed back, so plan to collect yours at the finish. Aid stations sit roughly every five miles along the course, with several crew-accessible points, so you are never too far from support. Confirm the current pacer rules, crew access, and drop-bag logistics in the official race details before race day.

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.