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BOSTON MARATHON 2023

Bob Callahan

Bib: 21488•M

CA

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Male)
#0 / 15176
Masters (Masters Men)
#0 / 9891
Division (M60-64)
#0 / 1110
Top 44%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ 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
8:21/mi
25:57
↑ 97↓ 3451.5%
10K· 6.21 mi
8:28/mi
52:14
↑ 79↓ 1380.4%
15K· 9.32 mi
8:28/mi
1:18:31
↑ 67↓ 78
20K· 12.43 mi
8:33/mi
1:45:06
↑ 106↓ 860.1%
Half· 13.11 mi
8:11/mi
1:50:41
↑ 19↓ 370.5%
25K· 15.53 mi
8:29/mi
2:11:14
↑ 66↓ 880.2%
30K· 18.64 mi
9:07/mi
2:39:34
↑ 181↓ 1480.2%
20M
8:50/mi
2:51:35
↑ 64↓ 500.2%
21M
8:50/mi
3:00:25
↑ 106↓ 241.6%
35K· 21.75 mi
8:23/mi
3:06:41
↑ 17↓ 861.7%
23M
8:43/mi
3:17:36
↑ 23↓ 630.6%
24M
9:51/mi
3:27:27
↓ 821.3%
40K· 24.85 mi
8:46/mi
3:34:57
↓ 200.3%
25.2M
9:40/mi
3:38:17
↑ 13↓ 160.2%
Finish· 26.22 mi
8:45/mi
3:47:12
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:50:41
Pace8:27 /mi
2nd Half
Distance13.11 mi
Time1:56:31
Pace8:53 /mi
📊Positive Split: 5.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:21:1625:578:2125:57
8:21
-
10K
6.21 mi11:47:3352:148:2426:17
8:28
+0:07
15K
9.32 mi12:13:501:18:318:2526:17
8:28
0:00
20K
12.43 mi12:40:251:45:068:2726:35
8:33
+0:05
Half
13.11 mi12:46:001:50:418:275:35
8:11
-0:22
25K
15.53 mi13:06:332:11:148:2720:33
8:29
+0:18
30K
18.64 mi13:34:532:39:348:3428:20
9:07
+0:38
20M
20.00 mi13:46:542:51:358:3512:01
8:50
-0:17
21M
21.00 mi13:55:443:00:258:358:50
8:50
0:00
35K
21.75 mi14:02:003:06:418:356:16
8:23
-0:27
23M
23.00 mi14:12:553:17:368:3510:55
8:43
+0:20
24M
24.00 mi14:22:463:27:278:399:51
9:51
+1:08
40K
24.85 mi14:30:163:34:578:397:30
8:46
-1:05
25.2M
25.20 mi14:33:363:38:178:403:20
9:40
+0:54
Finish
26.22 mi14:42:313:47:128:408:55
8:45
-0:55

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

8:11 /mi

Average Pace

8:40 /mi

Slowest Pace

9:51 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:50:55

49% of race

Time at Steady Pace

1:14:46

33% of race

Time at Slower Pace

41:31

18% of race

Average Pace: 8:40 /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 mi11:21:1625:578:2125:57
8:21
#16507
10K
6.21 mi11:47:3352:148:2426:17
8:28
#17245
15K
9.32 mi12:13:501:18:318:2526:17
8:28
#17346
20K
12.43 mi12:40:251:45:068:2726:35
8:33
#17298
Half
13.11 mi12:46:001:50:418:275:35
8:11
#17211
25K
15.53 mi13:06:332:11:148:2720:33
8:29
#17027
30K
18.64 mi13:34:532:39:348:3428:20
9:07
#17117
20M
20.00 mi13:46:542:51:358:3512:01
8:50
#16994
21M
21.00 mi13:55:443:00:258:358:50
8:50
#16750
35K
21.75 mi14:02:003:06:418:356:16
8:23
#16668
23M
23.00 mi14:12:553:17:368:3510:55
8:43
#16529
24M
24.00 mi14:22:463:27:278:399:51
9:51
#16768
40K
24.85 mi14:30:163:34:578:397:30
8:46
#16703
25.2M
25.20 mi14:33:363:38:178:403:20
9:40
#16674
Finish
26.22 mi14:42:313:47:128:408:55
8:45
#16670
Faster pace
Steady pace
Slower pace
Est.Checkpoint not recorded (estimated)
~Segment time uses estimated prior

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM60-64Seg. OverallSeg. MalesSeg. M60-64
5K3.11 mi3.11 mi16507108811088117524(Top 66%)11274(Top 74%)11274(Top 1016%)
10K6.21 mi3.10 mi17245-73811142-26111142-26117983(Top 68%)11496(Top 76%)11496(Top 1036%)
15K9.32 mi3.11 mi17346-10111200-5811200-5817524(Top 66%)11274(Top 74%)11274(Top 1016%)
20K12.43 mi3.11 mi17298+4811168+3211168+3217204(Top 65%)11133(Top 73%)11133(Top 1003%)
Half13.11 mi0.68 mi17211+8711138+3011138+3015646(Top 59%)10554(Top 70%)10554(Top 951%)
25K15.53 mi2.42 mi17027+18411045+9311045+9316044(Top 60%)10558(Top 70%)10558(Top 951%)
30K18.64 mi3.11 mi17117-9011064-1911064-1917781(Top 67%)11246(Top 74%)11246(Top 1013%)
20M20.00 mi1.36 mi16994+12311007+5711007+5715651(Top 59%)10265(Top 68%)10265(Top 925%)
21M21.00 mi1.00 mi16750+24410889+11810889+11812497(Top 47%)8785(Top 58%)8785(Top 791%)
35K21.75 mi0.75 mi16668+8210842+4710842+4714566(Top 55%)9684(Top 64%)9684(Top 872%)
23M23.00 mi1.25 mi16529+13910763+7910763+7914490(Top 54%)9578(Top 63%)9578(Top 863%)
24M24.00 mi1.00 mi16768-23910842-7910842-7920356(Top 76%)12145(Top 80%)12145(Top 1094%)
40K24.85 mi0.85 mi16703+6510800+4210800+4214921(Top 56%)9655(Top 64%)9655(Top 870%)
25.2M25.20 mi0.35 mi16674+2910779+2110779+2115923(Top 60%)10087(Top 66%)10087(Top 909%)
Finish26.22 mi1.02 mi16670+410766+1310766+1316746(Top 63%)10502(Top 69%)10502(Top 946%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 66%
×21story building
+97ft-345ft

Overall

17524

Males

11274

M60-64

11274

5K→10K

3.1 - 6.2 mi

Top 68%
×5story building
+79ft-138ft

Overall

17983

Males

11496

M60-64

11496

10K→15K

6.2 - 9.3 mi

Top 66%
×3story building
+67ft-78ft

Overall

17524

Males

11274

M60-64

11274

15K→20K

9.3 - 12.4 mi

Top 65%
×5story building
+106ft-86ft

Overall

17204

Males

11133

M60-64

11133

20K→Half

12.4 - 13.1 mi

Top 59%
×2story building
+19ft-37ft

Overall

15646

Males

10554

M60-64

10554

Half→25K

13.1 - 15.5 mi

Top 60%
×4story building
+66ft-88ft

Overall

16044

Males

10558

M60-64

10558

25K→30K

15.5 - 18.6 mi

Top 67%
×9story building
+181ft-148ft

Overall

17781

Males

11246

M60-64

11246

30K→20M

18.6 - 20.0 mi

Top 59%
×5story building
+64ft-50ft

Overall

15651

Males

10265

M60-64

10265

20M→21M

20.0 - 21.0 mi

Top 47%
×8story building
+106ft-24ft

Overall

12497

Males

8785

M60-64

8785

21M→35K

21.0 - 21.8 mi

Top 55%
×7story building
+17ft-86ft

Overall

14566

Males

9684

M60-64

9684

35K→23M

21.8 - 23.0 mi

Top 54%
×5story building
+23ft-63ft

Overall

14490

Males

9578

M60-64

9578

23M→24M

23.0 - 24.0 mi

Top 76%
×6story building
+12ft-82ft

Overall

20356

Males

12145

M60-64

12145

24M→40K

24.0 - 24.9 mi

Top 56%
×1story
+6ft-20ft

Overall

14921

Males

9655

M60-64

9655

40K→25.2M

24.9 - 25.2 mi

Top 60%
×1story
+13ft-16ft

Overall

15923

Males

10087

M60-64

10087

25.2M→Finish

25.2 - 26.2 mi

Top 63%
×2story building
+22ft-21ft

Overall

16746

Males

10502

M60-64

10502

Passing Analysis

Category:
Athletes Passed
1750
Passed By
1913
Net Change
-163
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#16507
5K → 10K94832-738#16507#17245
10K → 15K150251-101#17245#17346
15K → 20K184136+48#17346#17298
20K → Half925+87#17298#17211
Half → 25K22339+184#17211#17027
25K → 30K151241-90#17027#17117
30K → 20M14320+123#17117#16994
20M → 21M2506+244#16994#16750
21M → 35K919+82#16750#16668
35K → 23M15718+139#16668#16529
23M → 24M18257-239#16529#16768
24M → 40K9227+65#16768#16703
40K → 25.2M4415+29#16703#16674
25.2M → Finish6157+4#16674#16670
TOTALS17501913-163
📊

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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Questions or issues regarding timing data?

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Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing