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About RaceIndexOur methodologyData coverageCyclingTriathlon

Lowest GAP factor 10ks

The lowest gap factor 10ks, ranked from trusted raw-elevation route profiles across 110 qualifying races.

Ranking current as of

Which race ranks first — and why is it Bozeman Half Marathon & 10K?

Bozeman Half Marathon & 10K leads this ranking on gap factor (-5.3%).

Compare Bozeman Half Marathon & 10K vs La Jolla Half Marathon, 10K & 5K

#RaceGAP factorAscentClimb densityDescentNet elevationMax absolute gradeAs of
1Bozeman Half Marathon & 10K - montana-5.3%17 m1.7 m/km121 m-104 m4.0%
2La Jolla Half Marathon, 10K & 5K - california-4.5%76 m7.6 m/km197 m-121 m12.4%
3St. Croix Crossing Half Marathon 10K - minnesota-3.3%23 m2.3 m/km91 m-68 m10.4%
4Montana Marathon (Billings) 10K - montana-2.6%13 m1.3 m/km64 m-51 m4.0%
5RAD Half Marathon & 10K (Asheville) - north-carolina-2.3%92 m9.2 m/km163 m-72 m10.3%
6Generali Genève Marathon 10K - switzerland-1.3%81 m8.1 m/km129 m-48 m11.6%
7Zurich Rock 'n' Roll Running Series Madrid 10K - spain-0.8%66 m6.6 m/km93 m-26 m7.7%
8Bay of Fundy International Marathon 10K - maine-0.8%64 m6.4 m/km91 m-27 m9.1%
9Juneteenth Half Marathon & 10K (Washington DC) - dc-0.6%134 m13.4 m/km198 m-64 m15.7%
10Isle of Skye Half Marathon 10K - scotland-0.3%112 m11.2 m/km144 m-31 m9.9%
11Toulouse Métropole Run Experience 10K - france-0.2%40 m4.0 m/km50 m-10 m12.6%
12OTC Butte to Butte (Eugene) 10K - oregon-0.1%99 m9.9 m/km133 m-34 m11.8%
13SwissCityMarathon – Lucerne 10K - switzerland-0.1%27 m2.7 m/km31 m-4 m4.1%
14The Woodlands Marathon 10K - texas-0.1%20 m2.0 m/km23 m-3 m3.7%
15Zürich Marathon 10K - switzerland-0.1%15 m1.5 m/km17 m-2 m2.2%
16Nagyerdei Terep Maraton (Debrecen) 10K - hungary-0.0%29 m2.8 m/km31 m-3 m3.8%
17Naturosa Catania Marathon 10K - italy-0.0%4 m0.4 m/km4 m-0 m0.7%
18Summer Breeze Half Marathon (San Leandro) 10K - california0.0%0 m0.0 m/km0 m-0 m1.7%
19Vale of York Half Marathon 10K - yorkshire0.0%8 m0.8 m/km8 m-0 m1.0%
20Wilmslow Half Marathon 10K - north-west0.0%40 m4.0 m/km43 m-3 m3.4%
21Bath & Bristol Railway Races 10K - south-west0.1%7 m0.7 m/km6 m1 m2.6%
22ATW Bedford 10k & Half Marathon - east-of-england0.1%8 m0.8 m/km7 m0 m2.7%
23Tirol läuft (Innsbruck) 10K - austria0.1%33 m3.3 m/km35 m-2 m5.6%
24Etape Bornholm 10K - denmark0.1%56 m5.6 m/km62 m-6 m9.9%
25City of Colleges Half Marathon 10K - arkansas0.1%32 m3.2 m/km33 m-0 m2.8%
26NN Night Run Ostrava 10K - czechia0.1%51 m5.1 m/km54 m-3 m4.9%
27Bear Trail Half Marathon & 10K - delaware0.1%36 m3.6 m/km37 m-0 m4.9%
28Regeneron Great Limerick Run 10K - ireland0.2%55 m5.7 m/km58 m-3 m5.4%
29Reims Champagne Run 10K - france0.2%47 m4.7 m/km49 m-2 m4.5%
30Martian Invasion of Races 10K - michigan0.2%31 m3.1 m/km31 m0 m5.3%
31Garmin New Forest Marathon 10K - south-east0.2%40 m4.0 m/km41 m-2 m6.3%
32Paavo Nurmi Marathon 10K - finland0.2%42 m4.2 m/km42 m-1 m5.7%
33Indiana Women's Running Festival (Indy Women's Half Marathon), Carmel 10K - indiana0.2%36 m3.6 m/km36 m-0 m5.5%
34The Doncaster City 10K - yorkshire0.2%42 m4.2 m/km41 m0 m5.0%
35TBK Bank Quad Cities Marathon 10K - iowa0.2%29 m2.9 m/km28 m1 m6.4%
36The Original Las Vegas Marathon 10K - nevada0.2%55 m5.5 m/km56 m-0 m3.3%
37Athens Marathon. The Authentic 10K - greece0.2%79 m7.9 m/km83 m-4 m4.4%
38Garmin Olathe Marathon in the Land of Oz 10K - kansas0.2%55 m5.5 m/km55 m0 m5.0%
39Debrecen Maraton 10K - hungary0.3%46 m4.4 m/km46 m0 m5.5%
40Parkway Subaru Battleship Half Marathon & GFL 10K|5K (Wilmington) - north-carolina0.3%52 m5.2 m/km52 m0 m7.6%
41Mein Freiburg Marathon 10K - germany0.3%54 m5.4 m/km52 m2 m6.4%
42Cleveland Marathon 10K - ohio0.3%46 m4.6 m/km46 m0 m8.1%
43Naisten Kymppi (Helsinki) 10K - finland0.3%48 m4.8 m/km47 m1 m6.4%
44Trondheim Maraton 10K - norway0.4%51 m5.1 m/km51 m1 m9.0%
45Windermere Marathon (Spokane) 10K - washington0.4%62 m6.2 m/km62 m0 m5.0%
46Run Leicester 10K - east-midlands0.4%63 m6.3 m/km63 m-0 m5.6%
47Helvetia Half Marathon 10K - oregon0.4%51 m5.1 m/km49 m2 m5.4%
48Cajun Country Run 10K - louisiana0.4%61 m6.1 m/km61 m-0 m10.7%
49Naptown Half Marathon & 10K/5K - maryland0.5%63 m6.3 m/km63 m-0 m9.3%
50Marathon Vert Rennes 10K - france0.5%56 m5.6 m/km55 m1 m7.2%
51Garstang 10K - north-west0.5%80 m8.0 m/km81 m-1 m5.8%
52Thames Meander Marathon (London) 10K - london0.5%78 m7.8 m/km77 m0 m6.5%
53Madison Marathon (Madison, Wisconsin) 10K - wisconsin0.6%43 m4.3 m/km38 m4 m6.2%
54Ukrop's Monument Avenue 10K (Richmond) - virginia0.6%49 m4.9 m/km43 m6 m5.9%
55Lundaloppet 10K - sweden0.6%72 m7.2 m/km69 m3 m7.5%
56Haulin' Aspen Trail Race 10K - oregon0.6%130 m12.4 m/km155 m-25 m10.9%
57Bend Marathon and Half 10K - oregon0.7%68 m6.8 m/km68 m0 m10.2%
58Altru Family YMCA Firecracker 5K & 10K Fun Run/Walk - north-dakota0.7%79 m7.9 m/km79 m-0 m8.8%
59Clonakilty Waterfront Marathon 10K - ireland0.7%89 m8.9 m/km94 m-4 m12.3%
60Phoenix 10k & Half Marathon - arizona0.7%93 m9.3 m/km93 m0 m7.3%
61Endurancelife Suffolk (Dunwich) 10K - east-of-england0.7%88 m9.0 m/km89 m-1 m9.1%
62Flying Pig Marathon 10K - ohio0.8%82 m8.2 m/km83 m-1 m10.4%
63Gravel Worlds Run Series (Lincoln) 10K - nebraska0.8%90 m9.0 m/km90 m0 m6.7%
64Fayetteville Half Marathon 10K - arkansas0.8%82 m8.2 m/km82 m0 m10.6%
65Chester Marathon 10K - north-west0.9%60 m6.0 m/km50 m11 m6.2%
66St Albans Half Marathon 10K - east-of-england1.0%97 m9.7 m/km97 m0 m6.9%
67Rimi Riga Marathon 10K - latvia1.0%85 m8.5 m/km84 m1 m19.7%
68Run Madtown Half Marathon, 10K & 5K - wisconsin1.1%101 m10.1 m/km100 m1 m10.8%
69BTC Vulcan Run 10K (Birmingham) - alabama1.1%84 m8.4 m/km84 m-0 m20.5%
70Cedar Rapids Marathon 10K - iowa1.1%85 m8.5 m/km86 m-0 m13.8%
71Courses de Strasbourg Eurométropole 10K - france1.1%89 m8.9 m/km83 m6 m12.9%
72Run the Rainbow for Children's 10K - mississippi1.2%117 m11.7 m/km117 m0 m8.3%
73Greifenseelauf Uster 10K - switzerland1.2%52 m5.2 m/km34 m18 m9.6%
74Middlebury Maple Run 10K - vermont1.3%116 m11.6 m/km116 m-0 m11.3%
75Ultra Trail Vipava Valley (UTVV), Ajdovščina 10K - slovenia1.4%110 m11.0 m/km110 m1 m14.5%
76Montpellier Run Festival 10K - france1.4%94 m9.4 m/km82 m12 m9.9%
77Southampton Marathon 10K - south-east1.4%70 m7.0 m/km56 m14 m13.8%
78DNB Oslo Marathon 10K - norway1.4%128 m12.8 m/km130 m-2 m13.3%
79Norfolk Festival of Running (King's Lynn) 10K - east-of-england1.5%139 m13.9 m/km139 m-1 m9.8%
80LIDL São Silvestre de Lisboa 10K - portugal1.5%119 m11.9 m/km119 m0 m13.6%
81OhioHealth Capital City Half & Quarter Marathon (Columbus) 10K - ohio1.6%104 m9.8 m/km102 m1 m20.2%
82Double Decker Spring Run (Oxford, MS) 10K - mississippi1.6%138 m13.8 m/km138 m-0 m11.1%
83Acadia Half Marathon & 10K - maine1.7%135 m13.5 m/km139 m-4 m16.0%
84Greene & Schultz Hoosier Half Marathon, 5 & 10K - indiana1.9%134 m13.4 m/km134 m0 m16.3%
85Lift Bridge Road Races 10K - minnesota2.1%84 m8.4 m/km55 m29 m12.9%
86Spring Dash (Coeur d'Alene) 10K - idaho2.1%148 m14.8 m/km147 m1 m14.6%
87Spokane River Run 10K - washington2.3%152 m15.2 m/km152 m0 m17.2%
88TCS Lidingöloppet 10K - sweden2.3%162 m16.2 m/km159 m3 m12.4%
89TARC Stone Cat Trail Festival 10K - massachusetts2.3%155 m15.5 m/km155 m0 m17.5%
90Konza 25K & 10K (Manhattan) - kansas2.4%148 m14.8 m/km145 m4 m15.5%
91SPAR Budapest Marathon 10K - hungary2.7%152 m15.2 m/km152 m-0 m18.7%
92Statesman Cap10K (Austin) 10K - texas2.8%152 m15.2 m/km159 m-7 m22.6%
93The Skippo Trail Race 10K - missouri3.0%155 m15.5 m/km155 m0 m19.9%
94Tollymore Extreme (Tollymore Trail Marathon), Newcastle 10K - northern-ireland3.2%189 m18.9 m/km187 m2 m16.1%
956 sjöar (Uppsala) 10K - sweden4.1%222 m21.5 m/km231 m-9 m26.1%
96Trondheim Skogsmaraton 10K - norway4.2%232 m22.1 m/km232 m-0 m19.4%
97Portland Coastal Marathon 10K - south-west4.8%207 m20.7 m/km208 m-0 m22.0%
98Beachy Head Marathon 10K - south-east5.0%244 m24.4 m/km242 m1 m18.7%
99Telekom Vivicittá (Budapest) 10K - hungary5.7%248 m24.8 m/km249 m-0 m24.8%
100Two Tunnels Railway Races 10K - south-west5.8%244 m24.4 m/km241 m2 m18.1%
1
Bozeman Half Marathon & 10Kmontana
GAP factor
-5.3%
Ascent
17 m
Climb density
1.7 m/km
Descent
121 m
Net elevation
-104 m
Max absolute grade
4.0%

As of

6
Generali Genève Marathon 10Kswitzerland
GAP factor
-1.3%
Ascent
81 m
Climb density
8.1 m/km
Descent
129 m
Net elevation
-48 m
Max absolute grade
11.6%

As of

10
Isle of Skye Half Marathon 10Kscotland
GAP factor
-0.3%
Ascent
112 m
Climb density
11.2 m/km
Descent
144 m
Net elevation
-31 m
Max absolute grade
9.9%

As of

14
The Woodlands Marathon 10Ktexas
GAP factor
-0.1%
Ascent
20 m
Climb density
2.0 m/km
Descent
23 m
Net elevation
-3 m
Max absolute grade
3.7%

As of

15
Zürich Marathon 10Kswitzerland
GAP factor
-0.1%
Ascent
15 m
Climb density
1.5 m/km
Descent
17 m
Net elevation
-2 m
Max absolute grade
2.2%

As of

17
Naturosa Catania Marathon 10Kitaly
GAP factor
-0.0%
Ascent
4 m
Climb density
0.4 m/km
Descent
4 m
Net elevation
-0 m
Max absolute grade
0.7%

As of

19
Vale of York Half Marathon 10Kyorkshire
GAP factor
0.0%
Ascent
8 m
Climb density
0.8 m/km
Descent
8 m
Net elevation
-0 m
Max absolute grade
1.0%

As of

20
Wilmslow Half Marathon 10Knorth-west
GAP factor
0.0%
Ascent
40 m
Climb density
4.0 m/km
Descent
43 m
Net elevation
-3 m
Max absolute grade
3.4%

As of

22
ATW Bedford 10k & Half Marathoneast-of-england
GAP factor
0.1%
Ascent
8 m
Climb density
0.8 m/km
Descent
7 m
Net elevation
0 m
Max absolute grade
2.7%

As of

23
Tirol läuft (Innsbruck) 10Kaustria
GAP factor
0.1%
Ascent
33 m
Climb density
3.3 m/km
Descent
35 m
Net elevation
-2 m
Max absolute grade
5.6%

As of

24
Etape Bornholm 10Kdenmark
GAP factor
0.1%
Ascent
56 m
Climb density
5.6 m/km
Descent
62 m
Net elevation
-6 m
Max absolute grade
9.9%

As of

26
NN Night Run Ostrava 10Kczechia
GAP factor
0.1%
Ascent
51 m
Climb density
5.1 m/km
Descent
54 m
Net elevation
-3 m
Max absolute grade
4.9%

As of

27
Bear Trail Half Marathon & 10Kdelaware
GAP factor
0.1%
Ascent
36 m
Climb density
3.6 m/km
Descent
37 m
Net elevation
-0 m
Max absolute grade
4.9%

As of

29
Reims Champagne Run 10Kfrance
GAP factor
0.2%
Ascent
47 m
Climb density
4.7 m/km
Descent
49 m
Net elevation
-2 m
Max absolute grade
4.5%

As of

30
Martian Invasion of Races 10Kmichigan
GAP factor
0.2%
Ascent
31 m
Climb density
3.1 m/km
Descent
31 m
Net elevation
0 m
Max absolute grade
5.3%

As of

31
Garmin New Forest Marathon 10Ksouth-east
GAP factor
0.2%
Ascent
40 m
Climb density
4.0 m/km
Descent
41 m
Net elevation
-2 m
Max absolute grade
6.3%

As of

32
Paavo Nurmi Marathon 10Kfinland
GAP factor
0.2%
Ascent
42 m
Climb density
4.2 m/km
Descent
42 m
Net elevation
-1 m
Max absolute grade
5.7%

As of

34
The Doncaster City 10Kyorkshire
GAP factor
0.2%
Ascent
42 m
Climb density
4.2 m/km
Descent
41 m
Net elevation
0 m
Max absolute grade
5.0%

As of

39
Debrecen Maraton 10Khungary
GAP factor
0.3%
Ascent
46 m
Climb density
4.4 m/km
Descent
46 m
Net elevation
0 m
Max absolute grade
5.5%

As of

41
Mein Freiburg Marathon 10Kgermany
GAP factor
0.3%
Ascent
54 m
Climb density
5.4 m/km
Descent
52 m
Net elevation
2 m
Max absolute grade
6.4%

As of

42
Cleveland Marathon 10Kohio
GAP factor
0.3%
Ascent
46 m
Climb density
4.6 m/km
Descent
46 m
Net elevation
0 m
Max absolute grade
8.1%

As of

43
Naisten Kymppi (Helsinki) 10Kfinland
GAP factor
0.3%
Ascent
48 m
Climb density
4.8 m/km
Descent
47 m
Net elevation
1 m
Max absolute grade
6.4%

As of

44
Trondheim Maraton 10Knorway
GAP factor
0.4%
Ascent
51 m
Climb density
5.1 m/km
Descent
51 m
Net elevation
1 m
Max absolute grade
9.0%

As of

46
Run Leicester 10Keast-midlands
GAP factor
0.4%
Ascent
63 m
Climb density
6.3 m/km
Descent
63 m
Net elevation
-0 m
Max absolute grade
5.6%

As of

47
Helvetia Half Marathon 10Koregon
GAP factor
0.4%
Ascent
51 m
Climb density
5.1 m/km
Descent
49 m
Net elevation
2 m
Max absolute grade
5.4%

As of

48
Cajun Country Run 10Klouisiana
GAP factor
0.4%
Ascent
61 m
Climb density
6.1 m/km
Descent
61 m
Net elevation
-0 m
Max absolute grade
10.7%

As of

49
Naptown Half Marathon & 10K/5Kmaryland
GAP factor
0.5%
Ascent
63 m
Climb density
6.3 m/km
Descent
63 m
Net elevation
-0 m
Max absolute grade
9.3%

As of

50
Marathon Vert Rennes 10Kfrance
GAP factor
0.5%
Ascent
56 m
Climb density
5.6 m/km
Descent
55 m
Net elevation
1 m
Max absolute grade
7.2%

As of

51
Garstang 10Knorth-west
GAP factor
0.5%
Ascent
80 m
Climb density
8.0 m/km
Descent
81 m
Net elevation
-1 m
Max absolute grade
5.8%

As of

55
Lundaloppet 10Ksweden
GAP factor
0.6%
Ascent
72 m
Climb density
7.2 m/km
Descent
69 m
Net elevation
3 m
Max absolute grade
7.5%

As of

56
Haulin' Aspen Trail Race 10Koregon
GAP factor
0.6%
Ascent
130 m
Climb density
12.4 m/km
Descent
155 m
Net elevation
-25 m
Max absolute grade
10.9%

As of

57
Bend Marathon and Half 10Koregon
GAP factor
0.7%
Ascent
68 m
Climb density
6.8 m/km
Descent
68 m
Net elevation
0 m
Max absolute grade
10.2%

As of

60
Phoenix 10k & Half Marathonarizona
GAP factor
0.7%
Ascent
93 m
Climb density
9.3 m/km
Descent
93 m
Net elevation
0 m
Max absolute grade
7.3%

As of

62
Flying Pig Marathon 10Kohio
GAP factor
0.8%
Ascent
82 m
Climb density
8.2 m/km
Descent
83 m
Net elevation
-1 m
Max absolute grade
10.4%

As of

64
Fayetteville Half Marathon 10Karkansas
GAP factor
0.8%
Ascent
82 m
Climb density
8.2 m/km
Descent
82 m
Net elevation
0 m
Max absolute grade
10.6%

As of

65
Chester Marathon 10Knorth-west
GAP factor
0.9%
Ascent
60 m
Climb density
6.0 m/km
Descent
50 m
Net elevation
11 m
Max absolute grade
6.2%

As of

66
St Albans Half Marathon 10Keast-of-england
GAP factor
1.0%
Ascent
97 m
Climb density
9.7 m/km
Descent
97 m
Net elevation
0 m
Max absolute grade
6.9%

As of

67
Rimi Riga Marathon 10Klatvia
GAP factor
1.0%
Ascent
85 m
Climb density
8.5 m/km
Descent
84 m
Net elevation
1 m
Max absolute grade
19.7%

As of

70
Cedar Rapids Marathon 10Kiowa
GAP factor
1.1%
Ascent
85 m
Climb density
8.5 m/km
Descent
86 m
Net elevation
-0 m
Max absolute grade
13.8%

As of

73
Greifenseelauf Uster 10Kswitzerland
GAP factor
1.2%
Ascent
52 m
Climb density
5.2 m/km
Descent
34 m
Net elevation
18 m
Max absolute grade
9.6%

As of

74
Middlebury Maple Run 10Kvermont
GAP factor
1.3%
Ascent
116 m
Climb density
11.6 m/km
Descent
116 m
Net elevation
-0 m
Max absolute grade
11.3%

As of

76
Montpellier Run Festival 10Kfrance
GAP factor
1.4%
Ascent
94 m
Climb density
9.4 m/km
Descent
82 m
Net elevation
12 m
Max absolute grade
9.9%

As of

77
Southampton Marathon 10Ksouth-east
GAP factor
1.4%
Ascent
70 m
Climb density
7.0 m/km
Descent
56 m
Net elevation
14 m
Max absolute grade
13.8%

As of

78
DNB Oslo Marathon 10Knorway
GAP factor
1.4%
Ascent
128 m
Climb density
12.8 m/km
Descent
130 m
Net elevation
-2 m
Max absolute grade
13.3%

As of

83
Acadia Half Marathon & 10Kmaine
GAP factor
1.7%
Ascent
135 m
Climb density
13.5 m/km
Descent
139 m
Net elevation
-4 m
Max absolute grade
16.0%

As of

85
Lift Bridge Road Races 10Kminnesota
GAP factor
2.1%
Ascent
84 m
Climb density
8.4 m/km
Descent
55 m
Net elevation
29 m
Max absolute grade
12.9%

As of

87
Spokane River Run 10Kwashington
GAP factor
2.3%
Ascent
152 m
Climb density
15.2 m/km
Descent
152 m
Net elevation
0 m
Max absolute grade
17.2%

As of

88
TCS Lidingöloppet 10Ksweden
GAP factor
2.3%
Ascent
162 m
Climb density
16.2 m/km
Descent
159 m
Net elevation
3 m
Max absolute grade
12.4%

As of

90
Konza 25K & 10K (Manhattan)kansas
GAP factor
2.4%
Ascent
148 m
Climb density
14.8 m/km
Descent
145 m
Net elevation
4 m
Max absolute grade
15.5%

As of

91
SPAR Budapest Marathon 10Khungary
GAP factor
2.7%
Ascent
152 m
Climb density
15.2 m/km
Descent
152 m
Net elevation
-0 m
Max absolute grade
18.7%

As of

92
Statesman Cap10K (Austin) 10Ktexas
GAP factor
2.8%
Ascent
152 m
Climb density
15.2 m/km
Descent
159 m
Net elevation
-7 m
Max absolute grade
22.6%

As of

93
The Skippo Trail Race 10Kmissouri
GAP factor
3.0%
Ascent
155 m
Climb density
15.5 m/km
Descent
155 m
Net elevation
0 m
Max absolute grade
19.9%

As of

95
6 sjöar (Uppsala) 10Ksweden
GAP factor
4.1%
Ascent
222 m
Climb density
21.5 m/km
Descent
231 m
Net elevation
-9 m
Max absolute grade
26.1%

As of

96
Trondheim Skogsmaraton 10Knorway
GAP factor
4.2%
Ascent
232 m
Climb density
22.1 m/km
Descent
232 m
Net elevation
-0 m
Max absolute grade
19.4%

As of

97
Portland Coastal Marathon 10Ksouth-west
GAP factor
4.8%
Ascent
207 m
Climb density
20.7 m/km
Descent
208 m
Net elevation
-0 m
Max absolute grade
22.0%

As of

98
Beachy Head Marathon 10Ksouth-east
GAP factor
5.0%
Ascent
244 m
Climb density
24.4 m/km
Descent
242 m
Net elevation
1 m
Max absolute grade
18.7%

As of

100
Two Tunnels Railway Races 10Ksouth-west
GAP factor
5.8%
Ascent
244 m
Climb density
24.4 m/km
Descent
241 m
Net elevation
2 m
Max absolute grade
18.1%

As of

Showing the top 100 of 110 qualifying races; use the distance catalogue for the full searchable list. Scores are out of 100 when present; route, elevation and cost figures are shown in their natural units.

How we ranked these

Races are ranked by GAP factor. Score metrics use methodology scoring-methodology-v1.0. Elevation rankings use only trusted raw-elevation course profiles. A ranking is only published when at least five races qualify, so the table is never padded with thin data.

See exactly how each figure is calculated →

Route maps for this ranking

How we calculated this

Published facts and derived model outputs on this page are tied to stored sources or a published, version-locked methodology. We show the provenance so runners, coaches and organisers can check it. Data on this page is current as of .

Derived numbers use scoring-methodology-v1.0.

Sources used on this page (112)

Read the full methodology →

Common questions

What is the lowest gap factor 10ks?

Bozeman Half Marathon & 10K ranks first by gap factor, from 110 qualifying races compared under our published methodology.