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BOSTON MARATHON 2025

Joseph Kafka

Bib: 6425•M

ID

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Top 17%
Gender (Male)
#0 / 16105
Top 28%
Masters (Masters Men)
#0 / 10463
Top 14%
Division (M45-49)
#0 / 2386
Top 18%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent
Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
5K· 3.11 mi
6:29/mi
20:08
↑ 97↓ 3451.5%
10K· 6.21 mi
6:30/mi
40:21
↑ 79↓ 1380.4%
15K· 9.32 mi
6:32/mi
1:00:38
↑ 67↓ 78
20K· 12.43 mi
6:36/mi
1:21:07
↑ 106↓ 860.1%
Half· 13.11 mi
6:34/mi
1:25:36
↑ 19↓ 370.5%
25K· 15.53 mi
6:50/mi
1:42:10
↑ 66↓ 880.2%
30K· 18.64 mi
7:23/mi
2:05:05
↑ 181↓ 1480.2%
20M
7:31/mi
2:15:18
↑ 64↓ 500.2%
21M
7:50/mi
2:23:08
↑ 106↓ 241.6%
35K· 21.75 mi
7:08/mi
2:28:28
↑ 17↓ 861.7%
23M
7:23/mi
2:37:43
↑ 23↓ 630.6%
24M
7:14/mi
2:44:57
↓ 821.3%
40K· 24.85 mi
7:23/mi
2:51:16
↓ 200.3%
25.2M
8:10/mi
2:54:05
↑ 13↓ 160.2%
Finish· 26.22 mi
6:53/mi
3:01:06
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:25:36
Pace6:32 /mi
2nd Half
Distance13.11 mi
Time1:35:30
Pace7:17 /mi
📊Positive Split: 11.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:25:1720:086:2920:08
6:29
-
10K
6.21 mi10:45:3040:216:3020:13
6:30
+0:01
15K
9.32 mi11:05:471:00:386:3020:17
6:32
+0:02
20K
12.43 mi11:26:161:21:076:3220:29
6:36
+0:04
Half
13.11 mi11:30:451:25:366:324:29
6:34
-0:02
25K
15.53 mi11:47:191:42:106:3516:34
6:50
+0:16
30K
18.64 mi12:10:142:05:056:4322:55
7:23
+0:33
20M
20.00 mi12:20:272:15:186:4610:13
7:31
+0:08
21M
21.00 mi12:28:172:23:086:497:50
7:50
+0:19
35K
21.75 mi12:33:372:28:286:505:20
7:08
-0:42
23M
23.00 mi12:42:522:37:436:519:15
7:23
+0:15
24M
24.00 mi12:50:062:44:576:527:14
7:14
-0:09
40K
24.85 mi12:56:252:51:166:536:19
7:23
+0:09
25.2M
25.20 mi12:59:142:54:056:542:49
8:10
+0:47
Finish
26.22 mi13:06:153:01:066:557:01
6:53
-1:17

Checkpoints & Pacing

📈Pace Line

Pace Progression

Track your pace changes throughout the race. Dot colors mark your quickest to easiest segments, relative to your own pace.

Fastest Pace

6:29 /mi

Average Pace

6:55 /mi

Slowest Pace

8:10 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:42:10

56% of race

Time at Steady Pace

58:04

32% of race

Time at Slower Pace

20:52

12% of race

Average Pace: 6:54 /mi

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

🎨Heatmap

Pace Heatmap

Where you sped up and eased off relative to your own pace across the race. Colors are relative to your own range, not to other runners.

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

Click or hover over segments to see details

✨Sparklines

Checkpoint Splits with Pace Trends

Overall Pace Trend

CheckpointDistanceTime of DayTimeAvg PaceSegmentPaceTrendRank
5K
3.11 mi10:25:1720:086:2920:08
6:29
#3689
10K
6.21 mi10:45:3040:216:3020:13
6:30
#3730
15K
9.32 mi11:05:471:00:386:3020:17
6:32
#3730
20K
12.43 mi11:26:161:21:076:3220:29
6:36
#3698
Half
13.11 mi11:30:451:25:366:324:29
6:34
#3710
25K
15.53 mi11:47:191:42:106:3516:34
6:50
#3849
30K
18.64 mi12:10:142:05:056:4322:55
7:23
#4394
20M
20.00 mi12:20:272:15:186:4610:13
7:31
#4645
21M
21.00 mi12:28:172:23:086:497:50
7:50
#4736
35K
21.75 mi12:33:372:28:286:505:20
7:08
#4773
23M
23.00 mi12:42:522:37:436:519:15
7:23
#4851
24M
24.00 mi12:50:062:44:576:527:14
7:14
#4926
40K
24.85 mi12:56:252:51:166:536:19
7:23
#4959
25.2M
25.20 mi12:59:142:54:056:542:49
8:10
#4973
Finish
26.22 mi13:06:153:01:066:557:01
6:53
#4940
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM45-49Seg. OverallSeg. MalesSeg. M45-49
5K3.11 mi3.11 mi3689349534953738(Top 13%)3527(Top 22%)3527(Top 148%)
10K6.21 mi3.10 mi3730-413534-393534-393775(Top 13%)3560(Top 22%)3560(Top 149%)
15K9.32 mi3.11 mi37303525+93525+93738(Top 13%)3527(Top 22%)3527(Top 148%)
20K12.43 mi3.11 mi3698+323494+313494+313646(Top 13%)3443(Top 21%)3443(Top 144%)
Half13.11 mi0.68 mi3710-123504-103504-104158(Top 15%)3897(Top 24%)3897(Top 163%)
25K15.53 mi2.42 mi3849-1393626-1223626-1225107(Top 18%)4682(Top 29%)4682(Top 196%)
30K18.64 mi3.11 mi4394-5454106-4804106-4806903(Top 24%)5908(Top 37%)5908(Top 248%)
20M20.00 mi1.36 mi4645-2514307-2014307-2017089(Top 25%)5884(Top 37%)5884(Top 247%)
21M21.00 mi1.00 mi4736-914382-754382-756340(Top 22%)5276(Top 33%)5276(Top 221%)
35K21.75 mi0.75 mi4773-374400-184400-186098(Top 21%)5120(Top 32%)5120(Top 215%)
23M23.00 mi1.25 mi4851-784457-574457-575948(Top 21%)4926(Top 31%)4926(Top 206%)
24M24.00 mi1.00 mi4926-754512-554512-555989(Top 21%)4903(Top 30%)4903(Top 205%)
40K24.85 mi0.85 mi4959-334529-174529-176092(Top 21%)4892(Top 30%)4892(Top 205%)
25.2M25.20 mi0.35 mi4973-144538-94538-96767(Top 24%)5186(Top 32%)5186(Top 217%)
Finish26.22 mi1.02 mi4940+334500+384500+384964(Top 17%)4079(Top 25%)4079(Top 171%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 13%
×21story building
+97ft-345ft

Overall

3738

Males

3527

M45-49

3527

5K→10K

3.1 - 6.2 mi

Top 13%
×5story building
+79ft-138ft

Overall

3775

Males

3560

M45-49

3560

10K→15K

6.2 - 9.3 mi

Top 13%
×3story building
+67ft-78ft

Overall

3738

Males

3527

M45-49

3527

15K→20K

9.3 - 12.4 mi

Top 13%
×5story building
+106ft-86ft

Overall

3646

Males

3443

M45-49

3443

20K→Half

12.4 - 13.1 mi

Top 15%
×2story building
+19ft-37ft

Overall

4158

Males

3897

M45-49

3897

Half→25K

13.1 - 15.5 mi

Top 18%
×4story building
+66ft-88ft

Overall

5107

Males

4682

M45-49

4682

25K→30K

15.5 - 18.6 mi

Top 24%
×9story building
+181ft-148ft

Overall

6903

Males

5908

M45-49

5908

30K→20M

18.6 - 20.0 mi

Top 25%
×5story building
+64ft-50ft

Overall

7089

Males

5884

M45-49

5884

20M→21M

20.0 - 21.0 mi

Top 22%
×8story building
+106ft-24ft

Overall

6340

Males

5276

M45-49

5276

21M→35K

21.0 - 21.8 mi

Top 21%
×7story building
+17ft-86ft

Overall

6098

Males

5120

M45-49

5120

35K→23M

21.8 - 23.0 mi

Top 21%
×5story building
+23ft-63ft

Overall

5948

Males

4926

M45-49

4926

23M→24M

23.0 - 24.0 mi

Top 21%
×6story building
+12ft-82ft

Overall

5989

Males

4903

M45-49

4903

24M→40K

24.0 - 24.9 mi

Top 21%
×1story
+6ft-20ft

Overall

6092

Males

4892

M45-49

4892

40K→25.2M

24.9 - 25.2 mi

Top 24%
×1story
+13ft-16ft

Overall

6767

Males

5186

M45-49

5186

25.2M→Finish

25.2 - 26.2 mi

Top 17%
×2story building
+22ft-21ft

Overall

4964

Males

4079

M45-49

4079

Passing Analysis

Category:
Athletes Passed
763
Passed By
2014
Net Change
-1251
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#3689
5K → 10K115156-41#3689#3730
10K → 15K1041040#3730#3730
15K → 20K11280+32#3730#3698
20K → Half1123-12#3698#3710
Half → 25K46185-139#3710#3849
25K → 30K37582-545#3849#4394
30K → 20M21272-251#4394#4645
20M → 21M45136-91#4645#4736
21M → 35K3976-37#4736#4773
35K → 23M61139-78#4773#4851
23M → 24M41116-75#4851#4926
24M → 40K4679-33#4926#4959
40K → 25.2M2438-14#4959#4973
25.2M → Finish6128+33#4973#4940
TOTALS7632014-1251
📊

Passing Visuals

Category:
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🔄Passing Circle

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🌊Position Flow

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🏃Race Lanes

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Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing