Avenue of the Giants Marathon

Eureka, CA, USA · May 2, 2027·
partly-cloudy-day55°·64° high·Light·Dry
8
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Avenue of the Giants Marathon race day weather

partly-cloudy-day
55°at start
67° high
Light
Dry
Your goal
0:00:00

Cool start, warming up later

Runners will face a temperature rise from 55°F at the start to 65°F by the finish, with a light NW wind around 8 mph. Humidity levels will be moderate at 58%, making it crucial for runners to hydrate early and adjust pacing as temperatures climb. With a gently rolling course, maintaining a conservative effort in the opening laps will help manage the heat in the latter stages.

Race day forecast available in 158 days
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Pace Calculator

26.2mi
0:00:00
HH:MM:SS
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Avenue of the Giants Marathon route and elevation

The Avenue of the Giants Marathon course has about 634 ft (193 m) of climbing and 625 ft (190 m) of descent, and finishes near the elevation it starts. It is hillier than 55% of the marathon courses racecast.io has mapped, measured by what the hills cost in time. The hardest mile is mile 2, with 93 ft (28 m) of climbing and a 1.2% average grade.

Biggest climbs

  • Miles 1 to 1.2: climbs about 60 ft (18 m).
  • Miles 3.1 to 6.6: climbs about 160 ft (48 m).

What the hills cost

  • 3:30 on a flat course is about 3:31 here (1 minute slower).
  • 4:00 on a flat course is about 4:01 here (1 minute slower).
  • 4:30 on a flat course is about 4:31 here (1 minute slower).

Hills only, priced mile by mile on the course map. The pace calculator above adds the race-day weather.

Even-effort splits for a 3:30, 4:00 or 4:30 finish
The Avenue of the Giants Marathon mile splits at even effort for three finish times, with each mile's climb and descent
MileClimbDescent3:304:004:30
120 ft36 ft7:549:0210:10
293 ft28 ft8:319:4410:57
324 ft53 ft7:518:5810:06
470 ft20 ft8:249:3610:47
559 ft18 ft8:189:2910:41
633 ft0 ft8:159:2610:36
738 ft24 ft8:049:1410:23
80 ft42 ft7:498:5510:02
910 ft46 ft7:498:5710:04
1028 ft67 ft7:498:5610:03
1139 ft42 ft7:589:0510:14
1248 ft67 ft7:549:0210:09
1326 ft53 ft7:518:5910:06
1452 ft44 ft8:029:1110:20
1523 ft21 ft8:009:0710:16
1632 ft20 ft8:049:1410:22
1715 ft14 ft7:589:0710:16
1813 ft13 ft7:589:0610:15
1923 ft20 ft8:009:0810:16
2010 ft11 ft7:589:0710:15
2115 ft13 ft7:599:0710:16
2217 ft23 ft7:579:0510:13
237 ft14 ft7:579:0510:13
2421 ft25 ft7:579:0510:13
2521 ft19 ft7:599:0810:17
2641 ft46 ft7:579:0510:13
Last 0.210 ft6 ft1:472:022:17

Explore the Avenue of the Giants Marathon course with the weather and your pace along the route, or compare it with other races.

Race Plan

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A mile-by-mile breakdown of where your time goes, weather-adjusted splits, fueling timeline with aid stations, packing checklist, carb tracker, spectator guide, all built around your goal and race-day conditions.

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About the Avenue of the Giants Marathon

The Avenue of the Giants Marathon is held annually in May along the Avenue of the Giants in Humboldt Redwoods State Park in Humboldt County, California, United States. \n\n The course, consisting of two out-and-back legs, is almost entirely under the canopy of redwood trees. Half marathon and 10K races are run concurrently. The event, one of four larger annual races organized by the Six Rivers Running Club, was first run in 1972. In 2011, more than 2300 runners participated. Wikipedia

Race weekend

Sunday, May 2
7:45 AMMarathon (26.2 mi)
8:30 AMHalf Marathon (13.1 mi)8:30 AM10K (6.2 mi)

Avenue of the Giants Marathon FAQ

When is the 2027 Avenue of the Giants Marathon?

The 2027 Avenue of the Giants Marathon will be held on Sunday May 2, 2027.

Is the Avenue of the Giants Marathon a Boston Marathon Qualifier?

Yes, the Avenue of the Giants Marathon is an official Boston Marathon qualifier.

What will the weather be like for the 2027 Avenue of the Giants Marathon?

The forecast calls for a high of 70°F and a low of 49°F with a 6% chance of rain. Check our detailed hourly forecast above for the best marathon race plan.

What is the elevation gain of the Avenue of the Giants Marathon?

The Avenue of the Giants Marathon course has about 634 ft (193 m) of climbing and 625 ft (190 m) of descent, and finishes near the elevation it starts. It is hillier than 55% of the marathon courses racecast.io has mapped, measured by what the hills cost in time.

Is the Avenue of the Giants Marathon hilly?

Moderately. It has about 24 ft (7 m) of climbing per mile. The hardest mile is mile 2, with 93 ft (28 m) of climbing and a 1.2% average grade. 4:00 on a flat course is about 4:01 here (1 minute slower).

What is the weather usually like for the Avenue of the Giants Marathon?

Over the 26 years racecast.io has race-day weather for (2000 to 2026), it averaged 46°F at the start and 55°F by a typical finish. Rain fell during race hours in 4 of those years (2003, 2009, 2014 and 2024).

What was the hottest Avenue of the Giants Marathon?

Of the 26 years on record, 2016 was the warmest, reaching 74°F during race hours. The coldest start was 2011, at 37°F.

What was the windiest Avenue of the Giants Marathon?

Of the 26 years on record, 2017 was the windiest, with wind averaging 24 mph during race hours. The calmest was 2026, at 1 mph.

Avenue of the Giants Marathon weather history

Based on 26 years of data
Avg Temp
51°F
L:46° H:55°
RunScore
9
Conditions
Rain Freq
15%
4 of 26 yrs
Wind6mph
Dew47°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

YearConditionsLow / HighRainScoreResults
2026
cloudy
48°/52°-
10
2025
clear-day
38°/56°-
9
2024
cloudy
39°/50°Light
10
2023
cloudy
46°/54°-
10
2022
cloudy
46°/53°-
9
2021
cloudy
56°/62°-
7
2019
fog
46°/52°-
10
2018
cloudy
50°/56°-
9
2017
clear-day
47°/54°-
8
2016
clear-day
48°/74°-
7
2015
cloudy
47°/52°-
10
2014
cloudy
54°/57°Light
8
2013
partly-cloudy-day
48°/57°-
9
2012
partly-cloudy-day
44°/55°-
9
2011
clear-day
37°/51°-
10
2010
clear-day
43°/53°-
10
2009
rain
51°/54°Light
9
2008
cloudy
47°/51°-
10
2007
clear-day
42°/55°-
10
2006
partly-cloudy-day
47°/53°-
10
2005
clear-day
50°/56°-
9
2004
clear-day
48°/56°-
9
2003
rain
50°/56°Light
9
2002
partly-cloudy-day
45°/52°-
10
2001
clear-day
40°/57°-
10
2000
cloudy
48°/56°-
8