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BOSTON MARATHON 2025

Alexander Keller

Bib: 30416•M

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Male)
#0 / 16105
Masters (Masters Men)
#0 / 10463
Division (M40-44)
#0 / 2247
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
9:00/mi
27:58
↑ 97↓ 3451.5%
10K· 6.21 mi
8:25/mi
54:07
↑ 79↓ 1380.4%
15K· 9.32 mi
8:13/mi
1:19:38
↑ 67↓ 78
20K· 12.43 mi
8:18/mi
1:45:24
↑ 106↓ 860.1%
Half· 13.11 mi
8:07/mi
1:50:56
↑ 19↓ 370.5%
25K· 15.53 mi
8:22/mi
2:11:13
↑ 66↓ 880.2%
30K· 18.64 mi
8:43/mi
2:38:19
↑ 181↓ 1480.2%
20M
8:46/mi
2:50:14
↑ 64↓ 500.2%
21M
8:45/mi
2:58:59
↑ 106↓ 241.6%
35K· 21.75 mi
7:20/mi
3:04:28
↑ 17↓ 861.7%
23M
8:04/mi
3:14:34
↑ 23↓ 630.6%
24M
7:55/mi
3:22:29
↓ 821.3%
40K· 24.85 mi
7:56/mi
3:29:16
↓ 200.3%
25.2M
8:30/mi
3:32:12
↑ 13↓ 160.2%
Finish· 26.22 mi
7:26/mi
3:39:47
↑ 22↓ 21

The Course

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Half Splits

1st Half· via Half
Distance13.11 mi
Time1:50:56
Pace8:28 /mi
2nd Half✓ Faster
Distance13.11 mi
Time1:48:51
Pace8:18 /mi
📊Negative Split: 1.9% faster second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:49:1727:589:0027:58
9:00
-
10K
6.21 mi12:15:2654:078:4326:09
8:25
-0:35
15K
9.32 mi12:40:571:19:388:3325:31
8:13
-0:12
20K
12.43 mi13:06:431:45:248:2925:46
8:18
+0:05
Half
13.11 mi13:12:151:50:568:285:32
8:07
-0:11
25K
15.53 mi13:32:322:11:138:2720:17
8:22
+0:15
30K
18.64 mi13:59:382:38:198:3027:06
8:43
+0:21
20M
20.00 mi14:11:332:50:148:3111:55
8:46
+0:03
21M
21.00 mi14:20:182:58:598:318:45
8:45
-0:01
35K
21.75 mi14:25:473:04:288:295:29
7:20
-1:25
23M
23.00 mi14:35:533:14:348:2810:06
8:04
+0:44
24M
24.00 mi14:43:483:22:298:267:55
7:55
-0:09
40K
24.85 mi14:50:353:29:168:256:47
7:56
+0:01
25.2M
25.20 mi14:53:313:32:128:252:56
8:30
+0:34
Finish
26.22 mi15:01:063:39:478:237:35
7:26
-1:04

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

7:20 /mi

Average Pace

8:23 /mi

Slowest Pace

9:00 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

37:52

17% of race

Time at Steady Pace

1:46:11

48% of race

Time at Slower Pace

1:15:44

34% of race

Average Pace: 8:23 /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 mi11:49:1727:589:0027:58
9:00
#22396
10K
6.21 mi12:15:2654:078:4326:09
8:25
#20950
15K
9.32 mi12:40:571:19:388:3325:31
8:13
#19937
20K
12.43 mi13:06:431:45:248:2925:46
8:18
#19152
Half
13.11 mi13:12:151:50:568:285:32
8:07
#19014
25K
15.53 mi13:32:322:11:138:2720:17
8:22
#18568
30K
18.64 mi13:59:382:38:198:3027:06
8:43
#18057
20M
20.00 mi14:11:332:50:148:3111:55
8:46
#17853
21M
21.00 mi14:20:182:58:598:318:45
8:45
#17509
35K
21.75 mi14:25:473:04:288:295:29
7:20
#17160
23M
23.00 mi14:35:533:14:348:2810:06
8:04
#16744
24M
24.00 mi14:43:483:22:298:267:55
7:55
#16454
40K
24.85 mi14:50:353:29:168:256:47
7:56
#16204
25.2M
25.20 mi14:53:313:32:128:252:56
8:30
#16073
Finish
26.22 mi15:01:063:39:478:237:35
7:26
#15811
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM40-44Seg. OverallSeg. MalesSeg. M40-44
5K3.11 mi3.11 mi22396134771347717454(Top 61%)11415(Top 71%)11415(Top 508%)
10K6.21 mi3.10 mi20950+144612865+61212865+61219287(Top 68%)12182(Top 76%)12182(Top 542%)
15K9.32 mi3.11 mi19937+101312445+42012445+42017454(Top 61%)11415(Top 71%)11415(Top 508%)
20K12.43 mi3.11 mi19152+78512104+34112104+34116890(Top 59%)11126(Top 69%)11126(Top 495%)
Half13.11 mi0.68 mi19014+13812044+6012044+6016634(Top 59%)11029(Top 68%)11029(Top 491%)
25K15.53 mi2.42 mi18568+44611835+20911835+20916316(Top 57%)10779(Top 67%)10779(Top 480%)
30K18.64 mi3.11 mi18057+51111577+25811577+25816119(Top 57%)10547(Top 65%)10547(Top 469%)
20M20.00 mi1.36 mi17853+20411456+12111456+12115467(Top 54%)10130(Top 63%)10130(Top 451%)
21M21.00 mi1.00 mi17509+34411283+17311283+17311980(Top 42%)8376(Top 52%)8376(Top 373%)
35K21.75 mi0.75 mi17160+34911112+17111112+1717426(Top 26%)5960(Top 37%)5960(Top 265%)
23M23.00 mi1.25 mi16744+41610922+19010922+19010519(Top 37%)7499(Top 47%)7499(Top 334%)
24M24.00 mi1.00 mi16454+29010772+15010772+15010674(Top 38%)7530(Top 47%)7530(Top 335%)
40K24.85 mi0.85 mi16204+25010644+12810644+1289704(Top 34%)6914(Top 43%)6914(Top 308%)
25.2M25.20 mi0.35 mi16073+13110576+6810576+688826(Top 31%)6385(Top 40%)6385(Top 284%)
Finish26.22 mi1.02 mi15811+26210429+14710429+1478781(Top 31%)6335(Top 39%)6335(Top 282%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 61%
×21story building
+97ft-345ft

Overall

17454

Males

11415

M40-44

11415

5K→10K

3.1 - 6.2 mi

Top 68%
×5story building
+79ft-138ft

Overall

19287

Males

12182

M40-44

12182

10K→15K

6.2 - 9.3 mi

Top 61%
×3story building
+67ft-78ft

Overall

17454

Males

11415

M40-44

11415

15K→20K

9.3 - 12.4 mi

Top 59%
×5story building
+106ft-86ft

Overall

16890

Males

11126

M40-44

11126

20K→Half

12.4 - 13.1 mi

Top 59%
×2story building
+19ft-37ft

Overall

16634

Males

11029

M40-44

11029

Half→25K

13.1 - 15.5 mi

Top 57%
×4story building
+66ft-88ft

Overall

16316

Males

10779

M40-44

10779

25K→30K

15.5 - 18.6 mi

Top 57%
×9story building
+181ft-148ft

Overall

16119

Males

10547

M40-44

10547

30K→20M

18.6 - 20.0 mi

Top 54%
×5story building
+64ft-50ft

Overall

15467

Males

10130

M40-44

10130

20M→21M

20.0 - 21.0 mi

Top 42%
×8story building
+106ft-24ft

Overall

11980

Males

8376

M40-44

8376

21M→35K

21.0 - 21.8 mi

Top 26%
×7story building
+17ft-86ft

Overall

7426

Males

5960

M40-44

5960

35K→23M

21.8 - 23.0 mi

Top 37%
×5story building
+23ft-63ft

Overall

10519

Males

7499

M40-44

7499

23M→24M

23.0 - 24.0 mi

Top 38%
×6story building
+12ft-82ft

Overall

10674

Males

7530

M40-44

7530

24M→40K

24.0 - 24.9 mi

Top 34%
×1story
+6ft-20ft

Overall

9704

Males

6914

M40-44

6914

40K→25.2M

24.9 - 25.2 mi

Top 31%
×1story
+13ft-16ft

Overall

8826

Males

6385

M40-44

6385

25.2M→Finish

25.2 - 26.2 mi

Top 31%
×2story building
+22ft-21ft

Overall

8781

Males

6335

M40-44

6335

Passing Analysis

Category:
Athletes Passed
6680
Passed By
95
Net Change
+6585
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#22396
5K → 10K14559+1446#22396#20950
10K → 15K10185+1013#20950#19937
15K → 20K7905+785#19937#19152
20K → Half1424+138#19152#19014
Half → 25K4482+446#19014#18568
25K → 30K54837+511#18568#18057
30K → 20M23127+204#18057#17853
20M → 21M3462+344#17853#17509
21M → 35K3490+349#17509#17160
35K → 23M4160+416#17160#16744
23M → 24M2933+290#16744#16454
24M → 40K2500+250#16454#16204
40K → 25.2M1321+131#16204#16073
25.2M → Finish2620+262#16073#15811
TOTALS668095+6585
📊

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