2026 Tucson Marathon - Dec 13 Countdown

Q: When is the 2026 Tucson Marathon and what time does it start?

The 2026 Tucson Marathon is on Sunday, December 13, 2026, with the full marathon starting at 7:20 a.m. MST at Biosphere 2 near Oracle, AZ. The point-to-point course finishes at Pima Community College Northwest Campus near Tucson. The half marathon starts separately in Catalina, and a 50K and marathon relay share the full-marathon start.

Q: How much elevation does the Tucson Marathon course drop?

It is a genuine net-downhill point-to-point with an overall net loss of about 1,493 feet (roughly 455 m), against only ~292 ft (89 m) of climbing. The start at Biosphere 2 sits around 3,900 ft and the course descends through the desert toward Tucson. The descent is steepest in the first half, so control your early pace to save your quads.

Q: Is the Tucson Marathon a good Boston qualifier?

Yes — it is one of the fastest Boston-qualifying marathons in the US and the fastest course in Arizona. It is USATF-certified and a Boston Marathon Qualifier, and about 17.3% of finishers qualified for Boston in 2025 (14.7% in 2024). For 2025 the organizer trimmed the net drop to just under Boston's 1,500-foot limit, so times count with no downhill adjustment. Check your target with our Boston qualifying calculator.

Q: What is the time limit for the Tucson Marathon?

The official course time limit is 7.5 hours (7 hours 30 minutes), which works out to roughly a 17:10 per mile average pace — generous for a downhill course. Plan your splits with our pace calculator so you bank time on the early descent without going out too hard.

Q: What is the weather like for the Tucson Marathon?

Mid-December in the Sonoran Desert is cool and very dry — a race-morning low near 40°F (4°C) warming to a high around 64°F (18°C), with little chance of rain. It is excellent fast-running weather. Dress for a cold, high-elevation start at Biosphere 2 and shed layers on the descent; the dry air dehydrates faster than the cool temps suggest, so hydrate to plan.

Q: Where does the Tucson Marathon start and finish?

The marathon starts at Biosphere 2 near Oracle, AZ, north of the city, and runs the point-to-point route down through Catalina and Oro Valley to finish at Pima Community College Northwest Campus near Tucson. Because it is point-to-point and starts at elevation, plan to use the organizer's pre-dawn shuttle buses from the finish area up to the Biosphere 2 start.

Q: How do I register for the 2026 Tucson Marathon?

Registration is handled online through RaceRoster, with tiered pricing that rises as race day approaches (roughly $129 early up to about $179 race week for the full marathon). English-language online registration is straightforward for international runners. The race is organized by Aravaipa Running; register early because the field is capped.

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Race Information

Race	2026 Tucson Marathon - Dec 13
City	Tucson
Date	2026-12-13 at 07:20
Time Limit	7 hours 30 min
Cutoff pace	10:40/km
Timezone	America/Phoenix
Official Site	Tucson Marathon (Aravaipa Running)
Registration	Register · 129 USD

Race Day Weather

Average Temperature	10.5°C / 51°F
Humidity	44%
Wind	21.3 km/h
Rain Chance	13%
Typical Conditions	Cool, dry mid-December Sonoran Desert morning — prime fast-running and BQ weather

What to Prepare: Mid-December in the Tucson area is cool and very dry: a race-morning low near 40°F / 4°C climbing to a high around 64°F / 18°C, with little chance of rain. The 7:20 a.m. start up at Biosphere 2 (elevation ~3,900 ft) is the coldest point of the day, so wear throwaway gloves and a long-sleeve layer you can shed on the early downhill. The dry desert air can dehydrate you faster than the cool temps suggest — drink to plan.

Based on historical averages for race week. Use our Weather Score Calculator and What to Wear Guide for personalized advice.

Wind Impact on Race Day

Wind at 21.3 km/h can affect your marathon pace by 5-15 seconds per kilometer. Headwinds slow you down exponentially — a 20 km/h wind costs more than twice a 10 km/h wind.

Calculate your wind-adjusted pace →

Race-Week Climate

Based on 20 years of race-week weather (2005-2024), MERRA-2 reanalysis

	Cooler	Typical	Warmer
Temperature	6.4°C	10.6°C	15°C
Dew point	-9.7°C	-2.6°C	4.5°C

Wet-day chance: 13% Runnability: 87/100

Data: NASA POWER (MERRA-2 reanalysis), NASA Langley Research Center

Course Profile

Course Type	Point-to-point (net downhill)
Elevation Gain	89m
Terrain	Road (paved desert highway and valley streets, downhill throughout)
Profile	One of the fastest Boston-qualifying courses in the country and the fastest in Arizona. The point-to-point route starts at the iconic Biosphere 2 near Oracle, around 3,900 ft of elevation, and descends through the Sonoran Desert — past towering saguaro cacti with the Santa Catalina Mountains as a constant backdrop — down through Catalina and Oro Valley to finish at Pima Community College Northwest Campus near Tucson. The net elevation loss is about 1,493 feet (roughly 455 m) with only ~292 ft (89 m) of climbing. For 2025 the organizer fine-tuned the route to bring the net drop just under Boston's 1,500-foot (3.3 ft/mi) net-loss limit, so finish times count toward Boston qualifying with NO downhill adjustment. The descent is steepest in the first half and eases as you reach the valley floor, so banking smart early splits without trashing the quads is the key tactic. Cool, dry December air and a generally gentle grade make this a perennial PR and BQ destination: about 17.3% of finishers qualified for Boston in 2025 (14.7% in 2024). USATF-certified.
Boston Qualifier	Yes — Check your BQ time

Prepare for 2026 Tucson Marathon - Dec 13

Use our free training tools to get race-ready:

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Frequently Asked Questions

When is the 2026 Tucson Marathon and what time does it start?

The 2026 Tucson Marathon is on Sunday, December 13, 2026, with the full marathon starting at 7:20 a.m. MST at Biosphere 2 near Oracle, AZ. The point-to-point course finishes at Pima Community College Northwest Campus near Tucson. The half marathon starts separately in Catalina, and a 50K and marathon relay share the full-marathon start.

How much elevation does the Tucson Marathon course drop?

It is a genuine net-downhill point-to-point with an overall net loss of about 1,493 feet (roughly 455 m), against only ~292 ft (89 m) of climbing. The start at Biosphere 2 sits around 3,900 ft and the course descends through the desert toward Tucson. The descent is steepest in the first half, so control your early pace to save your quads.

Is the Tucson Marathon a good Boston qualifier?

Yes — it is one of the fastest Boston-qualifying marathons in the US and the fastest course in Arizona. It is USATF-certified and a Boston Marathon Qualifier, and about 17.3% of finishers qualified for Boston in 2025 (14.7% in 2024). For 2025 the organizer trimmed the net drop to just under Boston's 1,500-foot limit, so times count with no downhill adjustment. Check your target with our Boston qualifying calculator.

Does the Tucson Marathon's downhill mean my BQ time gets adjusted?

No. The Boston Athletic Association adjusts qualifying times only when a course's net elevation loss exceeds 1,500 feet (about 3.3 ft per mile). Tucson's net drop is about 1,493 feet — deliberately fine-tuned in 2025 to stay just under that threshold — so your finish time counts toward Boston qualifying with no downhill penalty.

What is the time limit for the Tucson Marathon?

The official course time limit is 7.5 hours (7 hours 30 minutes), which works out to roughly a 17:10 per mile average pace — generous for a downhill course. Plan your splits with our pace calculator so you bank time on the early descent without going out too hard.

What is the weather like for the Tucson Marathon?

Mid-December in the Sonoran Desert is cool and very dry — a race-morning low near 40°F (4°C) warming to a high around 64°F (18°C), with little chance of rain. It is excellent fast-running weather. Dress for a cold, high-elevation start at Biosphere 2 and shed layers on the descent; the dry air dehydrates faster than the cool temps suggest, so hydrate to plan.

Where does the Tucson Marathon start and finish?

The marathon starts at Biosphere 2 near Oracle, AZ, north of the city, and runs the point-to-point route down through Catalina and Oro Valley to finish at Pima Community College Northwest Campus near Tucson. Because it is point-to-point and starts at elevation, plan to use the organizer's pre-dawn shuttle buses from the finish area up to the Biosphere 2 start.

How do I register for the 2026 Tucson Marathon?

Registration is handled online through RaceRoster, with tiered pricing that rises as race day approaches (roughly $129 early up to about $179 race week for the full marathon). English-language online registration is straightforward for international runners. The race is organized by Aravaipa Running; register early because the field is capped.