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BOSTON MARATHON 2023

Stephen Callahan

Bib: 26347•M

MA

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Male)
#0 / 15176
Masters (Masters Men)
#0 / 9891
Division (M40-44)
#0 / 2241
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
10:39/mi
33:04
↑ 97↓ 3451.5%
10K· 6.21 mi
10:34/mi
1:05:55
↑ 79↓ 1380.4%
15K· 9.32 mi
10:46/mi
1:39:23
↑ 67↓ 78
20K· 12.43 mi
10:59/mi
2:13:31
↑ 106↓ 860.1%
Half· 13.11 mi
10:33/mi
2:20:43
↑ 19↓ 370.5%
25K· 15.53 mi
11:02/mi
2:47:27
↑ 66↓ 880.2%
30K· 18.64 mi
11:40/mi
3:23:41
↑ 181↓ 1480.2%
20M
13:00/mi
3:41:21
↑ 64↓ 500.2%
21M
12:27/mi
3:53:48
↑ 106↓ 241.6%
35K· 21.75 mi
11:26/mi
4:02:21
↑ 17↓ 861.7%
23M
12:20/mi
4:17:48
↑ 23↓ 630.6%
24M
12:29/mi
4:30:17
↓ 821.3%
40K· 24.85 mi
12:40/mi
4:41:07
↓ 200.3%
25.2M
13:09/mi
4:45:39
↑ 13↓ 160.2%
Finish· 26.22 mi
10:12/mi
4:56:03
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:20:43
Pace10:44 /mi
2nd Half
Distance13.11 mi
Time2:35:20
Pace11:51 /mi
📊Positive Split: 10.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:52:0833:0410:3933:04
10:39
-
10K
6.21 mi12:24:591:05:5510:3632:51
10:34
-0:05
15K
9.32 mi12:58:271:39:2310:4033:28
10:46
+0:12
20K
12.43 mi13:32:352:13:3110:4534:08
10:59
+0:13
Half
13.11 mi13:39:472:20:4310:447:12
10:33
-0:26
25K
15.53 mi14:06:312:47:2710:4726:44
11:02
+0:29
30K
18.64 mi14:42:453:23:4110:5636:14
11:40
+0:38
20M
20.00 mi15:00:253:41:2111:0417:40
13:00
+1:20
21M
21.00 mi15:12:523:53:4811:0812:27
12:27
-0:33
35K
21.75 mi15:21:254:02:2111:098:33
11:26
-1:01
23M
23.00 mi15:36:524:17:4811:1315:27
12:20
+0:54
24M
24.00 mi15:49:214:30:1711:1612:29
12:29
+0:09
40K
24.85 mi16:00:114:41:0711:1910:50
12:40
+0:11
25.2M
25.20 mi16:04:434:45:3911:204:32
13:09
+0:29
Finish
26.22 mi16:15:074:56:0311:1810:24
10:12
-2:57

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

10:12 /mi

Average Pace

11:18 /mi

Slowest Pace

13:09 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:56:59

40% of race

Time at Steady Pace

1:45:39

36% of race

Time at Slower Pace

1:13:25

25% of race

Average Pace: 11:17 /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 mi11:52:0833:0410:3933:04
10:39
#25050
10K
6.21 mi12:24:591:05:5510:3632:51
10:34
#24923
15K
9.32 mi12:58:271:39:2310:4033:28
10:46
#24916
20K
12.43 mi13:32:352:13:3110:4534:08
10:59
#24844
Half
13.11 mi13:39:472:20:4310:447:12
10:33
#24811
25K
15.53 mi14:06:312:47:2710:4726:44
11:02
#24683
30K
18.64 mi14:42:453:23:4110:5636:14
11:40
#24555
20M
20.00 mi15:00:253:41:2111:0417:40
13:00
#24637
21M
21.00 mi15:12:523:53:4811:0812:27
12:27
#24581
35K
21.75 mi15:21:254:02:2111:098:33
11:26
#24560
23M
23.00 mi15:36:524:17:4811:1315:27
12:20
#24562
24M
24.00 mi15:49:214:30:1711:1612:29
12:29
#24600
40K
24.85 mi16:00:114:41:0711:1910:50
12:40
#24618
25.2M
25.20 mi16:04:434:45:3911:204:32
13:09
#24624
Finish
26.22 mi16:15:074:56:0311:1810:24
10:12
#24575
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM40-44Seg. OverallSeg. MalesSeg. M40-44
5K3.11 mi3.11 mi25050145681456824896(Top 94%)14470(Top 95%)14470(Top 646%)
10K6.21 mi3.10 mi24923+12714510+5814510+5824805(Top 93%)14455(Top 95%)14455(Top 645%)
15K9.32 mi3.11 mi24916+714502+814502+824896(Top 94%)14470(Top 95%)14470(Top 646%)
20K12.43 mi3.11 mi24844+7214460+4214460+4224618(Top 92%)14329(Top 94%)14329(Top 639%)
Half13.11 mi0.68 mi24811+3314440+2014440+2024295(Top 91%)14182(Top 93%)14182(Top 633%)
25K15.53 mi2.42 mi24683+12814369+7114369+7124021(Top 90%)14034(Top 92%)14034(Top 626%)
30K18.64 mi3.11 mi24555+12814298+7114298+7124071(Top 90%)13998(Top 92%)13998(Top 625%)
20M20.00 mi1.36 mi24637-8214324-2614324-2625171(Top 95%)14466(Top 95%)14466(Top 646%)
21M21.00 mi1.00 mi24581+5614301+2314301+2323391(Top 88%)13616(Top 90%)13616(Top 608%)
35K21.75 mi0.75 mi24560+2114286+1514286+1523999(Top 90%)13850(Top 91%)13850(Top 618%)
23M23.00 mi1.25 mi24562-214278+814278+824415(Top 92%)14048(Top 93%)14048(Top 627%)
24M24.00 mi1.00 mi24600-3814277+114277+125042(Top 94%)14315(Top 94%)14315(Top 639%)
40K24.85 mi0.85 mi24618-1814276+114276+124641(Top 93%)14129(Top 93%)14129(Top 630%)
25.2M25.20 mi0.35 mi24624-614277-114277-124134(Top 91%)13862(Top 91%)13862(Top 619%)
Finish26.22 mi1.02 mi24575+4914249+2814249+2822313(Top 84%)13014(Top 86%)13014(Top 581%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 94%
×21story building
+97ft-345ft

Overall

24896

Males

14470

M40-44

14470

5K→10K

3.1 - 6.2 mi

Top 93%
×5story building
+79ft-138ft

Overall

24805

Males

14455

M40-44

14455

10K→15K

6.2 - 9.3 mi

Top 94%
×3story building
+67ft-78ft

Overall

24896

Males

14470

M40-44

14470

15K→20K

9.3 - 12.4 mi

Top 92%
×5story building
+106ft-86ft

Overall

24618

Males

14329

M40-44

14329

20K→Half

12.4 - 13.1 mi

Top 91%
×2story building
+19ft-37ft

Overall

24295

Males

14182

M40-44

14182

Half→25K

13.1 - 15.5 mi

Top 90%
×4story building
+66ft-88ft

Overall

24021

Males

14034

M40-44

14034

25K→30K

15.5 - 18.6 mi

Top 90%
×9story building
+181ft-148ft

Overall

24071

Males

13998

M40-44

13998

30K→20M

18.6 - 20.0 mi

Top 95%
×5story building
+64ft-50ft

Overall

25171

Males

14466

M40-44

14466

20M→21M

20.0 - 21.0 mi

Top 88%
×8story building
+106ft-24ft

Overall

23391

Males

13616

M40-44

13616

21M→35K

21.0 - 21.8 mi

Top 90%
×7story building
+17ft-86ft

Overall

23999

Males

13850

M40-44

13850

35K→23M

21.8 - 23.0 mi

Top 92%
×5story building
+23ft-63ft

Overall

24415

Males

14048

M40-44

14048

23M→24M

23.0 - 24.0 mi

Top 94%
×6story building
+12ft-82ft

Overall

25042

Males

14315

M40-44

14315

24M→40K

24.0 - 24.9 mi

Top 93%
×1story
+6ft-20ft

Overall

24641

Males

14129

M40-44

14129

40K→25.2M

24.9 - 25.2 mi

Top 91%
×1story
+13ft-16ft

Overall

24134

Males

13862

M40-44

13862

25.2M→Finish

25.2 - 26.2 mi

Top 84%
×2story building
+22ft-21ft

Overall

22313

Males

13014

M40-44

13014

Passing Analysis

Category:
Athletes Passed
1115
Passed By
640
Net Change
+475
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#25050
5K → 10K251124+127#25050#24923
10K → 15K112105+7#24923#24916
15K → 20K13563+72#24916#24844
20K → Half363+33#24844#24811
Half → 25K15224+128#24811#24683
25K → 30K16133+128#24683#24555
30K → 20M22104-82#24555#24637
20M → 21M659+56#24637#24581
21M → 35K3110+21#24581#24560
35K → 23M4547-2#24560#24562
23M → 24M1957-38#24562#24600
24M → 40K2240-18#24600#24618
40K → 25.2M814-6#24618#24624
25.2M → Finish567+49#24624#24575
TOTALS1115640+475
📊

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