California International Marathon Race Prep

California International Marathon race prep: training paces for your goal time, a race-day fueling plan, and course elevation analysis. Free, no signup.

Use TrainPace to plan a simple, repeatable strategy for California International Marathon: pacing targets, fueling basics, and course/elevation awareness.

Pace calculator: training zones + race pace
Fuel planner: carbs/hour + gel timing
Elevation analysis: hills, grades, and difficulty

How to prepare for California International Marathon

Plan pacing, fueling, and course strategy for California International Marathon using free calculators and GPX elevation analysis.

Pick a realistic goal time: Use a recent race result or time trial to set a starting point.
Set training paces: Calculate easy, tempo, threshold, and interval paces for your training block.
Build a fueling plan: Estimate carbs/hour and gel timing that you can practice in long runs.
Review course elevation: Upload a GPX to spot key climbs and decide where to adjust effort.

California International Marathon course facts

CIM is known as one of the fastest courses in America, featuring a net downhill profile from Folsom to Sacramento. Popular for Boston qualifying attempts and PRs.

California International Marathon at a glance
Metric	Value
Location	Sacramento, California, USA
Distance	42.195 km
Elevation gain	45 m (148 ft)
Elevation loss	107 m (351 ft)
Start / finish elevation	115 m / 8 m
Official site	https://runsra.org/california-international-marathon/

California International Marathon pacing strategy

CIM's net downhill is a gift, but you must respect it. Don't go out too fast in the first half - the quads-destroying downhill can catch up to you.

Pacing by course segment (miles)
Miles	Terrain	Advice
1-5	Gradual downhill	Rolling start in Folsom. Resist going fast. Save your quads.
6-12	Gradual downhill	Steady descent. This is where people blow up by going too fast.
13-18	Flattening	Course flattens as you approach Sacramento. Assess your legs.
19-23	Mostly flat	Through Sacramento neighborhoods. The downhill advantage is over.
24-26	Flat finish	Finish at the State Capitol. If you ran smart, you'll PR here.

Fueling notes

The downhill profile changes muscle recruitment - quads take a beating. Standard fueling works but your legs may tire differently than a flat course.

Race-day tips

Net downhill course - excellent for BQ attempts and PRs
December weather is usually cool and ideal
Point-to-point: don't let the downhill start fool you
Large pace groups for Boston qualifying times

Frequently asked questions

Is CIM good for Boston qualifying?

Yes! CIM is one of the most popular BQ courses. The net downhill (107m drop), December weather, and large pace groups make it ideal for qualifying attempts.

How much downhill is CIM?

CIM has a net elevation drop of 107m (340ft) from Folsom to Sacramento. It's gradual enough to not destroy your quads if you run smart.

Is CIM harder than it looks?

Yes. Many runners go out too fast on the downhill start and pay for it in the second half. Run even effort, not even pace, especially in miles 1-12.

What's the weather like at CIM?

December in Sacramento is usually cool: 4-12°C (40-54°F). Can be foggy at the start. Generally excellent marathon conditions.

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