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BOSTON MARATHON 2025

John Korir

Bib: 2 M KE

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 0.1%
Gender (Male)
#0 / 16105
Top 0.1%
Division (M18-39)
#0 / 5642
Top 0.1%
Race Day Weather
50°/40°F
broken clouds

Race Timeline

Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
469 ft elev
5K· 3.11 mi
4:37/mi
14:21
↑ 97↓ 3451.5%
220 ft elev
10K· 6.21 mi
4:40/mi
28:52
↑ 79↓ 1380.4%
157 ft elev
15K· 9.32 mi
4:42/mi
43:29
↑ 67↓ 78
146 ft elev
20K· 12.43 mi
4:52/mi
58:35
↑ 106↓ 860.1%
165 ft elev
Half· 13.11 mi
4:50/mi
1:01:53
↑ 19↓ 370.5%
148 ft elev
25K· 15.53 mi
4:50/mi
1:13:37
↑ 66↓ 880.2%
127 ft elev
30K· 18.64 mi
4:50/mi
1:28:39
↑ 181↓ 1480.2%
138 ft elev
20M
4:40/mi
1:34:59
↑ 64↓ 500.2%
148 ft elev
21M
4:40/mi
1:39:39
↑ 106↓ 241.6%
227 ft elev
35K· 21.75 mi
4:34/mi
1:43:04
↑ 17↓ 861.7%
156 ft elev
23M
4:34/mi
1:48:47
↑ 23↓ 630.6%
116 ft elev
24M
4:34/mi
1:53:21
↓ 821.3%
34 ft elev
40K· 24.85 mi
4:43/mi
1:57:23
↓ 200.3%
20 ft elev
25.2M
6:17/mi
1:59:33
↑ 13↓ 160.2%
18 ft elev
Finish· 26.22 mi
5:06/mi
2:04:45
↑ 22↓ 21
17 ft elev
Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent

The Course

Half Splits

1st Half· via Half
1:01:534:43 /mi⚡ faster
2nd Half
1:02:524:48 /mi+1.6%
Positive split — 1.6% slower in the second half
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Your race, unpacked

See your splits, ranks & AI insights.

Checkpoint Splits

CheckpointTimeAvg PaceSegment LengthSegment TimeSegment PaceTrendDiff
5K
14:214:373.11 mi14:21
4:37
-
10K
28:524:393.10 mi14:31
4:40
+0:03
15K
43:294:403.11 mi14:37
4:42
+0:02
20K
58:354:433.11 mi15:06
4:52
+0:10
Half(13.11 mi)
1:01:534:430.68 mi3:18
4:50
-0:02
25K
1:13:374:442.42 mi11:44
4:50
0:00
30K
1:28:394:453.11 mi15:02
4:50
0:00
20M
1:34:594:451.36 mi6:20
4:40
-0:10
21M
1:39:394:451.00 mi4:40
4:40
0:00
35K
1:43:044:440.75 mi3:25
4:34
-0:06
23M
1:48:474:441.25 mi5:43
4:34
0:00
24M
1:53:214:431.00 mi4:34
4:34
0:00
40K
1:57:234:430.85 mi4:02
4:43
+0:09
25.2M
1:59:334:450.35 mi2:10
6:17
+1:34
Finish(26.22 mi)
2:04:454:461.02 mi5:12
5:06
-1:11
Trend:
Faster pace
Steady pace
Slower pace

Checkpoints & Pacing

Pace Line

Fastest Pace

4:34 /mi

Average Pace

4:46 /mi

Slowest Pace

6:17 /mi

Loading chart...
Fastest
Middle
Slowest
Average

Segments

Time at Faster Pace

0:00

0% of race

Time at Steady Pace

1:57:23

94% of race

Time at Slower Pace

7:22

6% of race

Average Pace: 4:45 /mi

Loading chart...
Faster pace (< avg)
Steady pace (≈ avg)
Slower pace (> avg)

Heatmap

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0mi6.6mi13.1mi19.7mi26.2mi
Pace:
Faster
Steady
Slower

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi444999
10K6.21 mi3.10 mi1+31+31+3111
15K9.32 mi3.11 mi111999
20K12.43 mi3.11 mi111333
Half13.11 mi0.68 mi2-12-12-1333
25K15.53 mi2.42 mi1+11+11+1222
30K18.64 mi3.11 mi111777
20M20.00 mi1.36 mi111111
21M21.00 mi1.00 mi111111
35K21.75 mi0.75 mi111111
23M23.00 mi1.25 mi111111
24M24.00 mi1.00 mi111111
40K24.85 mi0.85 mi111111
25.2M25.20 mi0.35 mi111204188188
Finish26.22 mi1.02 mi111191818

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 0.03%
×21story building
+97ft-345ft

Overall

9

Males

9

M18-39

9

5K→10K

3.1 - 6.2 mi

Top 0.004%
×5story building
+79ft-138ft

Overall

1

Males

1

M18-39

1

10K→15K

6.2 - 9.3 mi

Top 0.03%
×3story building
+67ft-78ft

Overall

9

Males

9

M18-39

9

15K→20K

9.3 - 12.4 mi

Top 0.01%
×5story building
+106ft-86ft

Overall

3

Males

3

M18-39

3

20K→Half

12.4 - 13.1 mi

Top 0.01%
×2story building
+19ft-37ft

Overall

3

Males

3

M18-39

3

Half→25K

13.1 - 15.5 mi

Top 0.007%
×4story building
+66ft-88ft

Overall

2

Males

2

M18-39

2

25K→30K

15.5 - 18.6 mi

Top 0.02%
×9story building
+181ft-148ft

Overall

7

Males

7

M18-39

7

30K→20M

18.6 - 20.0 mi

Top 0.004%
×5story building
+64ft-50ft

Overall

1

Males

1

M18-39

1

20M→21M

20.0 - 21.0 mi

Top 0.004%
×8story building
+106ft-24ft

Overall

1

Males

1

M18-39

1

21M→35K

21.0 - 21.8 mi

Top 0.004%
×7story building
+17ft-86ft

Overall

1

Males

1

M18-39

1

35K→23M

21.8 - 23.0 mi

Top 0.004%
×5story building
+23ft-63ft

Overall

1

Males

1

M18-39

1

23M→24M

23.0 - 24.0 mi

Top 0.004%
×6story building
+12ft-82ft

Overall

1

Males

1

M18-39

1

24M→40K

24.0 - 24.9 mi

Top 0.004%
×1story
+6ft-20ft

Overall

1

Males

1

M18-39

1

40K→25.2M

24.9 - 25.2 mi

Top 0.7%
×1story
+13ft-16ft

Overall

204

Males

188

M18-39

188

25.2M→Finish

25.2 - 26.2 mi

Top 0.07%
×2story building
+22ft-21ft

Overall

19

Males

18

M18-39

18

Passing Analysis

Category:
Athletes Passed
4
Passed By
1
Net Change
+3
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#4
5K → 10K30+3#4#1
10K → 15K000#1#1
15K → 20K000#1#1
20K → Half01-1#1#2
Half → 25K10+1#2#1
25K → 30K000#1#1
30K → 20M000#1#1
20M → 21M000#1#1
21M → 35K000#1#1
35K → 23M000#1#1
23M → 24M000#1#1
24M → 40K000#1#1
40K → 25.2M000#1#1
25.2M → Finish000#1#1
TOTALS41+3

Passing Charts

Category:
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Passing Circle

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Position Flow

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Race Lanes

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