California International Marathon Training Plan 2026: Course Profile, Elevation, BQ Strategy, Pacing & Fueling

The California International Marathon has been one of the most important Boston qualifying races in the United States for more than forty years. It is famous for a reason. The point-to-point route from Folsom to downtown Sacramento is fast, the field is packed with runners chasing specific times, and the course's 366-foot net drop keeps it well below the Boston Athletic Association's new downhill indexing threshold.

But the course is also misunderstood in exactly the way that ruins races.

Runners arrive at CIM expecting a smooth downhill conveyor belt and instead get a first half full of rollers, descents that quietly load the quads, and a second half that only becomes truly fast if the first half was run with restraint. The race is not hard because it is steep. It is hard because it invites the wrong interpretation of its own profile.

This guide is about the race the course actually is: the opening downhill speed trap, the rolling first 13 miles, the flatter Fair Oaks Boulevard stretch where CIM begins to reward patience, the late bridge crossing, the downtown finish, the BQ math, the fueling realities, and the logistics that matter if you want the day to feel smooth instead of improvised.

CIM at a Glance

• Race: California International Marathon (CIM)
• Date: First Sunday in December (December 6, 2026)
• Start: Folsom-Auburn Road near Folsom Dam, 7:00 AM
• Finish: California State Capitol, Sacramento
• Course type: Point-to-point, west from Folsom to downtown Sacramento
• Net downhill: 366 feet
• Start / finish elevation: 359 feet to 19 feet
• Total elevation gain / loss: approximately 663 feet up, 1,003 feet down
• Course unchanged since: 1983
• Boston qualification relevance: one of the best-known BQ races in the US, with CIM itself highlighting a 30.2% BQ rate among 2025 finishers
• 2027 BAA downhill indexing: not applicable to CIM
• Key challenges: mile 1 downhill speed trap, rolling first half, quad damage from overusing descents, flat second half that punishes bad pacing, bridge crossing around mile 21.5, and weather that ranges from perfect to ugly
• Best training block: 16 to 18 weeks
• Best single pacing cue: Net downhill is an average, not a running experience

The Most Misunderstood Sentence in US Marathon Running

The sentence is: CIM is a net-downhill marathon.

It is true. It is also the sentence that causes runners to train for the wrong race.

CIM's start sits at 359 feet above sea level and the finish sits at 19 feet. That produces an official net elevation drop of 366 feet. Many runners hear that and picture a course that trends steadily downward, with gravity doing part of the work from Folsom to Sacramento.

That is not what the course feels like.

CIM reaches that net number through a first half full of rollers. The course loses more elevation than it gains, but it does so by repeatedly going up and down across the first 20 miles before flattening substantially in the second half. The result is a course that is absolutely fast, but only for runners who understand that its speed comes from restraint early and execution late.

This is why the most dangerous decision at CIM often happens before mile 1. The opening downhill gives runners a false signal that the course will help all day. It will not. The first half lends speed. The second half asks whether you paid interest on it.

Course Profile and Elevation

The California International Marathon course profile divides cleanly into two parts.

Phase One: miles 0 to 13

The first half is rolling. Not mountainous, not dramatic, but rhythm-breaking in exactly the way marathon pacing dislikes. The climbs are short enough that runners are tempted to attack them. The descents are fast enough that runners are tempted to "take free speed." Both decisions are expensive if repeated for 13 miles.

Phase Two: miles 13 to 26.2

The second half progressively flattens. This is the part of CIM that deserves the course's fast reputation. Once the rollers ease and the route moves into longer, flatter stretches, the course becomes genuinely runnable in the way people imagine when they register for CIM.

What the profile means in practice

• The first half is not where you prove fitness
• The second half is where CIM becomes a BQ course
• Downhill running at CIM is not "free speed," it is quad loading
• The flatter the course becomes, the more previous pacing decisions matter

If you train for a gentle downhill marathon, you are underprepared for CIM. If you train for a rolling first half and a fast flat second half, you are training for the actual race.

Course Breakdown by Segment

Miles 0 to 1: The Speed Trap

The opening mile is the single most dangerous mile on the course. The race starts in the dark, the field is amped, and the first section tips sharply enough downhill that many runners find themselves 20 to 30 seconds per mile faster than goal pace without meaning to be. That is not a harmless mistake at CIM. It is the opening move in a race-long energy leak.

The correct approach is counterintuitive: run the opening downhill at goal effort, not goal pace. Let the GPS split look a little slow relative to your dream scenario. That is usually the disciplined choice.

Miles 1 to 8.5: The Folsom Foothills Rollers

This is where CIM starts telling the truth. Short climbs, short descents, repeat. The net trend is downhill, but the experience is not one-directional. Runners who try to hold even splits on the climbs drift too far above marathon effort. Runners who hammer the descents quietly tax the quads. Runners who do both are often the ones searching for answers at mile 22.

This section should feel controlled, almost patient to the point of mild annoyance.

Miles 8.5 to 13: San Juan Hills and the Halfway Approach

The rollers keep coming, and the emotion of approaching halfway often nudges runners into premature commitment. This is the section where disciplined CIM runners feel slightly underpaced and impulsive CIM runners feel pleased with themselves. The second group is usually in worse shape than they think.

A key part of the strategy here is emotional management. If you feel like you are holding back too much at halfway, that is usually evidence that you are doing it right.

Miles 13 to 20: Fair Oaks Boulevard and the Long Flat Opening

This is where the course begins to reward good decisions. The road flattens, the rhythm lengthens, and runners who conserved through the first half can begin to run more directly at their actual target pace. This is not the place to surge. It is the place to start expressing the race you saved.

The strongest CIM runners often start building here, not exploding here. The difference matters.

Mile 20: The Breakthrough Zone

The crowd support here matters. It is loud, targeted, and psychologically useful. Use it. Just do not convert crowd energy into a sudden pace spike you have to pay back 15 minutes later.

Mile 21.5: The Bridge

The late bridge crossing is not a hard hill in absolute terms. At mile 21.5 of a marathon, it is significant because it arrives after a course that has already spent your quads and calves in quieter ways. This is where soleus weakness and downhill fatigue often announce themselves.

Shorten the stride. Keep the cadence up. Cross it and move on. Everything after this point is genuinely runnable if you have anything left.

Miles 22 to 26.2: Downtown Sacramento and the Capitol Finish

This is the part of CIM the marketing is talking about. Flat streets, an organized push into downtown, neighborhoods that count down toward the finish, and a clean final run to the California State Capitol. If you raced the first half correctly, this can be one of the most satisfying closing sections in American marathoning.

If you did not, this is where the course stops offering mercy.

Pacing Strategy

The best CIM pacing strategy is not "go out conservative" in some vague sense. It is more specific than that.

Phase one pacing: effort-based

Through the rollers, pace is a noisy metric. Effort matters more. Let the uphills be slower. Let the descents be natural. Keep the heart rate and breathing where they belong for marathon effort. The first half of CIM is not a place for split vanity.

Phase two pacing: pace-based

Once the course flattens, the task becomes simpler. Now pace matters. This is where runners who preserved their legs can move from marathon restraint to marathon execution.

How to Train for CIM

A generic flat-marathon plan is not good enough for CIM. The course asks for three things that standard plans often underemphasize: downhill tolerance, roller rhythm, and late-race flat speed after 20 miles of terrain variation.

1. Downhill durability

You need downhill running in training. Not just because CIM is net downhill, but because the descents create eccentric quad load that flat running does not replicate. If your quads are not conditioned for that demand, the second half becomes a negotiation.

2. Rolling-hill rhythm

CIM rewards runners who know how to keep effort stable across short climbs and descents. The best workout here is a rolling marathon-effort or moderate-tempo session where the target is even effort, not even splits.

3. Late-race flat work

The final six miles of CIM are not a reward for training hard. They are a reward for training specifically. Long runs that finish with flat marathon-pace work are one of the best ways to prepare for this race.

Key workouts for a CIM training plan

• Rolling hill tempo: steady effort across punchy hills without forcing pace on climbs
• Downhill long-run segment: controlled descents at marathon effort to build quad resilience
• Late-race flat tempo: 5 to 8 miles of marathon pace at the end of a long run
• Opening-mile simulation: practice holding effort on a downhill without letting pace get stupid

Strength work that matters for CIM

• eccentric quad work
• split squats with slow lowering
• bent-knee calf raises for soleus durability
• single-leg balance and landing stability
• hip and glute strength to preserve form late

CIM and the 2027 BAA Downhill Indexing Rules

This is one of the most important practical details in the entire guide.

Starting with registration for the 2027 Boston Marathon, the B.A.A. applies downhill result indexing to qualifying times run on courses with a net downhill of 1,500 feet or more. CIM's official net downhill is 366 feet, which means CIM is not subject to the new index penalties.

That is a big deal. It means a CIM time goes to Boston as run. No five-minute add-on. No ten-minute add-on. No special interpretation.

For runners who previously targeted aggressively downhill qualifiers and now need a BQ course that remains unindexed, CIM becomes even more relevant than it already was.

Read the full BQ cutoff guide →

Weather and Race-Day Conditions

CIM usually gets the kind of early-December weather marathon runners fantasize about: cold start, cool finish, low humidity, and a course that feels built for performance. But Sacramento is still weather, not architecture. Bad years exist.

Typical CIM weather

Most years, the race starts in the low 40s Fahrenheit and warms into the 50s by late morning. That is excellent racing weather.

The bad-year scenarios

• heavy rain
• gusty wind
• surprisingly warm conditions
• cold start that punishes runners who underdress before the gun

The point is not to obsess over forecast variability. It is to prepare a simple race-morning decision tree. If it is wet, be more careful on early descents. If it is warm, back off the early pace. If it is windy, accept that some stretches are effort-based instead of pace-based.

Use the marathon heat adjustment calculator →

Fueling Strategy

CIM has 17 aid stations across the course. Water and Precision Hydration are available throughout, and Precision Fuel gels are available at three stations. That is useful support, but not enough to outsource your fueling plan.

Why CIM fueling needs a real plan

The rolling first half increases the odds that runners delay or skip early fueling because the race feels "too early" or "too easy" or "too downhill" to need it. That is exactly how runners arrive at mile 20 behind on carbohydrate and start blaming the course for a problem they created in the first hour.

What to do

• Take your first gel early, typically around mile 4 to 5
• Do not rely only on on-course gels
• Carry enough carbohydrate for your full plan
• Use aid stations to support the plan, not define it
• Practice fueling on downhills in training, because some runners tolerate it worse than they expect

Practical CIM fueling note

Race support is there to help, not to rescue a vague strategy. Know what you will take, when you will take it, and what you will carry yourself.

Read the full evidence-based marathon fueling guide →

Logistics: Buses, Hotels, Expo, and the Start Line

The buses matter

CIM's free start-line bus system is one of the best logistical features of the race. It solves the early-morning cold-start problem and makes staying near the finish much more attractive than it would be at many point-to-point marathons.

Where to stay

For most runners, downtown Sacramento is the simplest choice. You are near the finish, near the expo, and near major bus pickup options. Staying near the start in Folsom can make race morning easier, but it complicates everything after the finish.

Expo strategy

The expo is part of the weekend, but it should not become a lower-leg fatigue festival. Go, get your bib, keep moving, and leave. This is still race week, not a convention for making bad shoe decisions.

Start-line reality

CIM starts early, in the dark, and in December. That means race-morning organization matters. Lay out gear the night before. Confirm your bus zone. Arrive with margin. A BQ attempt should not begin with a half-sprint to a bus you thought left 15 minutes later.

Read the complete marathon race week guide →

Build Your CIM Training Plan

A good California International Marathon plan is not just a generic marathon build with "fast course" written on top. It should specifically prepare you for:

• the opening downhill speed trap
• 13 miles of rolling effort management
• quad durability on descents
• late-race flat speed after accumulated terrain
• bridge and calf resilience
• December race-week execution