Devil After Dark Marathon

Las Vegas, NV, USA · September 4, 2027·
partly-cloudy-day95°→ 86° finish·Light·Dry
3
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Devil After Dark Marathon race day weather

partly-cloudy-day
95°at start
86° at finish
Light
Dry
Your goal
0:00:00

Hot start, cooler finish

Runners will face a hot start at 95°F, gradually cooling to 86°F by the finish. Wind will be light from the SSW, providing a tailwind from miles 1 to 11, before shifting to a headwind from miles 12 to 13 and then again from 16 to 27. With low humidity at 18%, hydration will be crucial, especially early on, and pacing should be conservative to manage the heat.

This course climbs 1,230 ft to its high point and back, so we look at it at 2 points, not just the start line. In a typical year, at 9:00/mi, you start at 95° and finish around 8:55 PM in 86°.

Race day forecast available in 282 days
Along your raceStart line only
partly-cloudy-day2
partly-cloudy-day2
partly-cloudy-day3
Start
partly-cloudy-day3
mi 7
partly-cloudy-day4
mi 13
clear-night4
Finish
clear-night4
clear-night4
clear-night4

Pace Calculator

26.2mi
0:00:00
HH:MM:SS
Pace
—

Enter a finish time to see what race day does to it.

Common Goals:

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Devil After Dark Marathon route and elevation

The Devil After Dark Marathon course has about 2,429 ft (740 m) of climbing. It is hillier than 96% of the marathon courses racecast.io has mapped, measured by what the hills cost in time. The hardest mile is mile 22, with 238 ft (73 m) of climbing and a 3.4% average grade.

Biggest climbs

  • Miles 0.2 to 4.7: climbs about 710 ft (217 m).
  • Miles 5.8 to 11: climbs about 880 ft (268 m).
  • Miles 13.2 to 15.2: climbs about 365 ft (111 m).

What the hills cost

  • 3:30 on a flat course is about 3:41 here (11 minutes slower).
  • 4:00 on a flat course is about 4:12 here (12 minutes slower).
  • 4:30 on a flat course is about 4:44 here (14 minutes 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 Devil After Dark Marathon mile splits at even effort for three finish times, with each mile's climb and descent
MileClimbDescent3:304:004:30
1141 ft9 ft8:429:5711:12
2159 ft0 ft8:5810:1411:31
3139 ft0 ft8:4610:0211:17
4170 ft3 ft9:0210:1911:36
5106 ft164 ft7:258:289:32
642 ft186 ft7:098:109:11
7154 ft0 ft8:5410:1111:28
8170 ft8 ft8:5810:1511:32
9173 ft3 ft9:0310:2111:38
10189 ft7 ft9:1010:2811:47
11173 ft0 ft9:0510:2311:40
120 ft171 ft7:058:059:06
136 ft187 ft7:038:049:04
14162 ft21 ft8:4710:0311:19
15179 ft9 ft9:0410:2111:38
1646 ft140 ft7:178:209:23
1711 ft170 ft7:078:079:08
180 ft192 ft7:028:029:02
1911 ft169 ft7:068:089:09
200 ft160 ft7:078:089:08
21112 ft77 ft7:549:0110:10
22238 ft56 ft9:0910:2811:46
233 ft189 ft7:038:039:04
240 ft143 ft7:098:119:11
250 ft152 ft7:088:099:10
260 ft159 ft7:068:079:09
Last 0.29 ft15 ft1:411:552:09

Explore the Devil After Dark Marathon course with the weather and your pace along the route, or compare it with other races.

Race Plan

Get your personalized Devil After Dark Marathon race plan

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.

Race Pace
Weather Splits
Nutrition
Gear & Packing
T-Minus
Carb Tracker
Spectator Guide
Race Band

About the Devil After Dark Marathon

About the Devil After Dark Race: Over the years, one of my favorite times at our Running with the Devil extreme heat race in late June is when the sun sets, and the night air just beckons you to be outside and run! Devil After Dark brings you that magic with a late summer evening run.

Commencing just before sunset, run through Lovell Canyon while enjoying the stunning sunset as day falls into night. Sun is replaced by stars and moonlight lights the way. The omnipresence of the surrounding canyon under the moonlit starry night is magical! Pinion Juniper trees dance in the shadows and the neon lights of Las Vegas are just minutes away. An enchanted late summer evening run.
Source

Race weekend

Saturday, September 4
5:00 PMMarathon (26.2 mi)
5:30 PMHalf Marathon (13.1 mi)6:00 PM10K (6.2 mi)6:00 PM5K (3.1 mi)

Devil After Dark Marathon FAQ

When is the 2027 Devil After Dark Marathon?

The 2027 Devil After Dark Marathon will be held on Saturday September 4, 2027.

What is the time limit for the Devil After Dark Marathon?

The time limit for the Devil After Dark Marathon is 7 hours.

What will the weather be like for the 2027 Devil After Dark Marathon?

The forecast calls for a high of 96°F and a low of 73°F with a 2% chance of rain.

What is the elevation gain of the Devil After Dark Marathon?

The Devil After Dark Marathon course has about 2,429 ft (740 m) of climbing.

Is the Devil After Dark Marathon hilly?

Yes. It has about 93 ft (28 m) of climbing per mile. The hardest mile is mile 22, with 238 ft (73 m) of climbing and a 3.4% average grade. 4:00 on a flat course is about 4:12 here (12 minutes slower). It is hillier than 96% of the marathon courses racecast.io has mapped, measured by what the hills cost in time.

What is the weather usually like for the Devil After Dark Marathon?

Over the 9 years racecast.io has race-day weather for (2018 to 2026), it averaged 93°F at the start and 93°F by a typical finish. It has not rained during race hours in any of those years.

What was the hottest Devil After Dark Marathon?

Of the 9 years on record, 2018 was the warmest, reaching 99°F during race hours. The coldest start was 2019, at 84°F.

What was the windiest Devil After Dark Marathon?

Of the 9 years on record, 2022 was the windiest, with wind averaging 12 mph during race hours. The calmest was 2019, at 3 mph.

Devil After Dark Marathon weather history

Based on 9 years of data
Avg Temp
89°F
L:84° H:93°
RunScore
4
Conditions
Rain Freq
0%
0 of 9 yrs
Wind8mph
Dew34°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

YearConditionsLow / HighRainScoreResults
2026
clear-day
83°/93°-
4
2025
clear-day
84°/92°-
3
2024
clear-day
84°/90°-
4
2023
clear-day
86°/95°-
3
2022
clear-day
83°/92°-
4
2021
clear-day
82°/93°-
4
2020
clear-day
86°/97°-
4
2019
clear-day
76°/84°-
5
2018
clear-day
91°/99°-
3