Half Marathon Difficulty Calculator
Enter your target half marathon time to see how it would translate across different 21.1km courses. Each race's difficulty is calculated from its elevation gain, expected race-day temperature, and surface type - so you can find the fastest, flattest course for a PB.
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Showing 60 half marathons
Byers Peak Stampede Half Marathon & 5K Run
Fraser, United States of America · 22 Aug 2026
Road0m gain28°C
1:45:08Moderate Difficulty
Staunton Rocks! Marathon and Half Marathon
Pine, United States of America · 22 Aug 2026
Road0m gain36°C
1:48:30Moderate Difficulty
Kirk-Wood Half Marathon
Kirkland, United States of America · 22 Aug 2026
Road0m gain25°C
1:43:27Moderate Difficulty
Run Rockaway Beach End Of Summer Marathon, Half Marathon & 5K
Rockaway BEACH, United States of America · 22 Aug 2026
Road0m gain16°C
1:40:50Easy
GLO Toronto Half Marathon/10K/5K
Toronto, Canada · 22 Aug 2026
Road0m gain23°C
1:43:09Moderate Difficulty
Running the Rapids Half Marathon and 5K
Cohasset, United States of America · 22 Aug 2026
Road0m gain21°C
1:43:20Moderate Difficulty
Placentia Half Marathon
Piacenza, Italy · 22 Aug 2026
Road133m gain29°C
1:51:09Moderate Difficulty
Strider Half Marathon
Milwaukee, United States of America · 22 Aug 2026
Road0m gain26°C
1:44:09Moderate Difficulty
Lace Up for Rock CF: Half Marathon Group Run
Orange, United States of America · 22 Aug 2026
Road0m gain34°C
1:49:16Moderate Difficulty
Rock Hall Half Marathon presented by INFINITI
Cleveland, United States of America · 23 Aug 2026
Road0m gain22°C
1:43:33Moderate Difficulty
Antrim Coast Half Marathon
Larne, United Kingdom · 23 Aug 2026
Road66m gain17°C
1:43:17Moderate Difficulty
Black Diamond Express Half Marathon & 5K
Mendon, United States of America · 23 Aug 2026
Road0m gain24°C
1:43:45Moderate Difficulty
Californian Dreamin 5K, 10K, & Half Marathon by Califlow Runs
Long Beach, United States of America · 23 Aug 2026
Road0m gain
1:40:47Easy
Hall of Fame Half Marathon/Relay - Pro Football Hall of Fame Race Series
Canton, United States of America · 23 Aug 2026
Road0m gain
1:40:47Easy
TC Jester Half Marathon & 10k
Houston, United States of America · 23 Aug 2026
Road0m gain
1:40:47Easy
Hellbender 5k & Half Marathon
Bear Gap, United States of America · 23 Aug 2026
Road0m gain
1:40:47Easy
One Love Run – 5K, 10K, 10M, and Half Marathon
Long Beach, United States of America · 23 Aug 2026
Road0m gain
1:40:47Easy
Santa Rosa Half Marathon
Santa Rosa, United States of America · 24 Aug 2026
Road53m gain26°C
1:45:21Moderate Difficulty
Bali Half Marathon
Bali, Indonesia · 24 Aug 2026
Road165m gain23°C
1:49:02Moderate Difficulty
Lake Country Half Marathon
Oconomowoc, United States of America · 29 Aug 2026
Road0m gain
1:40:47Easy
Taste of Portage Half Marathon and 5K
Portage, United States of America · 29 Aug 2026
Road0m gain
1:40:47Easy
Scouting America Half Marathon & Tenderfoot 5K
Bowling Green, United States of America · 29 Aug 2026
Road0m gain
1:40:47Easy
Deer Trail Run 5K/10K/Half-Marathon
Cincinnati, United States of America · 29 Aug 2026
Trail0m gain
2:20:24Very Difficult
Asheville Craft Beer Half Marathon & 10K/5K
Asheville, United States of America · 29 Aug 2026
Road0m gain
1:40:47Easy
Swansea Half Marathon
Swansea, United Kingdom · 29 Aug 2026
Road36m gain17°C
1:41:15Easy
Öpfinger Osterlauf Halbmarathon
Öpfingen, Germany · 29 Aug 2026
Road51m gain18°C
1:40:52Easy
Kerikeri Half Marathon
Okaihau, New Zealand · 29 Aug 2026
Road129m gain16°C
1:45:31Moderate Difficulty
Night of the Running Dead 5K, 10K, 1 Miler, Half Marathon SummerWeen Series by Califlow Runs
Long Beach, United States of America · 29 Aug 2026
Road0m gain
1:40:47Easy
Tacoma Narrows Half Marathon / 10K / 5K
Tacoma, United States of America · 29 Aug 2026
Road0m gain
1:40:47Easy
Ashland Half Marathon & 5k
Ashland, United States of America · 29 Aug 2026
Road0m gain
1:40:47Easy
TBK Bank Thirsty 13 Half Marathon
Durango, United States of America · 29 Aug 2026
Road0m gain
1:40:47Easy
Moonlight on the Falls - Marathon, Half Marathon, Quarter Marathon, and Distance Challenge
Davis, United States of America · 29 Aug 2026
Road0m gain
1:40:47Easy
Iron Horse Half Marathon
North Bend, United States of America · 30 Aug 2026
Road0m gain
1:40:47Easy
Stavanger Halvmarathon
Stavanger, Norway · 30 Aug 2026
Road126m gain17°C
1:45:32Moderate Difficulty
Howard's Half Marathon/5K Run Festival
Cumberland, United States of America · 30 Aug 2026
Road0m gain
1:40:47Easy
Pocatello Half Marathon
Bannock County, United States of America · 30 Aug 2026
Road108m gain27°C
1:47:19Moderate Difficulty
Northstowe Festival of Running Half Marathon
Cambridge, United Kingdom · 30 Aug 2026
Mixed36m gain19°C
2:02:14Very Difficult
Koberstädter Halbmarathon
Egelsbach, Germany · 31 Aug 2026
Road249m gain24°C
1:52:41Difficult
Meia Maratona de Floripa
Florianópolis, Brazil · 31 Aug 2026
Road48m gain22°C
1:44:25Moderate Difficulty
Mntwi l Nłʔay Virtual Half Marathon
Missoula, United States of America · 1 Sept 2026
Road0m gain
1:40:47Easy
Meia Maratona da Paz - Angola
Luanda, Angola · 1 Sept 2026
Road15m gain31°C
1:51:36Moderate Difficulty
Nebraska Marathon - Marathon, Half Marathon, 10K & 5K
Papillion, United States of America · 5 Sept 2026
Road0m gain
1:40:47Easy
Step Up Half Marathon, Relay & 5k
Storm Lake, United States of America · 5 Sept 2026
Road0m gain
1:40:47Easy
Leave No Trace Trail Half Marathon
Peninsula, United States of America · 5 Sept 2026
Trail271m gain26°C
2:34:57Very Difficult
Chippenham Half Marathon
Chippenham, United Kingdom · 5 Sept 2026
Road99m gain18°C
1:43:58Moderate Difficulty
Naperville Trails Half Marathon & 10K
Wheaton, United States of America · 5 Sept 2026
Road0m gain
1:40:47Easy
Labor Day Trail Challenge: Return of the Bull (5K · 10K · Half-Marathon · Marathon ·1 Hour)
Cedar Creek, United States of America · 5 Sept 2026
Trail0m gain
2:20:24Very Difficult
Run Branch County 5k & Half Marathon
Coldwater, United States of America · 6 Sept 2026
Road0m gain
1:40:47Easy
Trondheim Halvmaraton
Trondheim, Norway · 6 Sept 2026
Road338m gain16°C
1:53:17Difficult
Kauai Half Marathon
Poipu, United States of America · 6 Sept 2026
Road228m gain29°C
1:57:27Difficult
Sackets Harbor Marathon & Half Marathon
Sackets Harbor, United States of America · 6 Sept 2026
Road0m gain
1:40:47Easy
Bound for Boston Marathon & Half Marathon - Atlanta
Johns Creek, United States of America · 6 Sept 2026
Road0m gain
1:40:47Easy
Bear Trail Half Marathon & 10K
Bear, United States of America · 6 Sept 2026
Trail0m gain
2:20:24Very Difficult
The Hoot Half Marathon & 10k Trail Race
Lewis Center, United States of America · 6 Sept 2026
Trail0m gain
2:20:24Very Difficult
Highline Half Marathon
Paynesville, United States of America · 6 Sept 2026
Road0m gain
1:40:47Easy
Amish Country Half Marathon
Millersburg, United States of America · 6 Sept 2026
Road278m gain25°C
1:54:52Difficult
Fiesta Half Marathon & 10K - Bakersfield
Bakersfield, United States of America · 6 Sept 2026
Road0m gain
1:40:47Easy
Oak Tree Half Marathon & 5K Run/Walk
Geneseo, United States of America · 6 Sept 2026
Road0m gain
1:40:47Easy
Labor Day Half Marathon
Parker, United States of America · 7 Sept 2026
Road0m gain
1:40:47Easy
Dingle Full and Half Marathon
Dingle, Ireland · 7 Sept 2026
Road490m gain
2:00:15Difficult