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BOSTON MARATHON 2023

David Seddon

Bib: 27981•M

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Male)
#0 / 15176
Masters (Masters Men)
#0 / 9891
Division (M55-59)
#0 / 1422
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
9:46/mi
30:21
↑ 97↓ 3451.5%
10K· 6.21 mi
9:38/mi
1:00:18
↑ 79↓ 1380.4%
15K· 9.32 mi
9:37/mi
1:30:10
↑ 67↓ 78
20K· 12.43 mi
10:08/mi
2:01:40
↑ 106↓ 860.1%
Half· 13.11 mi
10:16/mi
2:08:40
↑ 19↓ 370.5%
25K· 15.53 mi
10:44/mi
2:34:42
↑ 66↓ 880.2%
30K· 18.64 mi
12:37/mi
3:13:55
↑ 181↓ 1480.2%
20M
11:32/mi
3:29:36
↑ 64↓ 500.2%
21M
14:15/mi
3:43:51
↑ 106↓ 241.6%
35K· 21.75 mi
11:50/mi
3:52:42
↑ 17↓ 861.7%
23M
12:36/mi
4:08:28
↑ 23↓ 630.6%
24M
11:24/mi
4:19:52
↓ 821.3%
40K· 24.85 mi
11:27/mi
4:29:39
↓ 200.3%
25.2M
12:54/mi
4:34:06
↑ 13↓ 160.2%
Finish· 26.22 mi
11:51/mi
4:46:11
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:08:40
Pace9:49 /mi
2nd Half
Distance13.11 mi
Time2:37:31
Pace12:01 /mi
📊Positive Split: 22.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:47:3030:219:4630:21
9:46
-
10K
6.21 mi12:17:271:00:189:4229:57
9:38
-0:08
15K
9.32 mi12:47:191:30:109:4029:52
9:37
-0:01
20K
12.43 mi13:18:492:01:409:4731:30
10:08
+0:31
Half
13.11 mi13:25:492:08:409:497:00
10:16
+0:08
25K
15.53 mi13:51:512:34:429:5826:02
10:44
+0:28
30K
18.64 mi14:31:043:13:5510:2439:13
12:37
+1:53
20M
20.00 mi14:46:453:29:3610:2915:41
11:32
-1:05
21M
21.00 mi15:01:003:43:5110:4014:15
14:15
+2:43
35K
21.75 mi15:09:513:52:4210:428:51
11:50
-2:25
23M
23.00 mi15:25:374:08:2810:4815:46
12:36
+0:46
24M
24.00 mi15:37:014:19:5210:5011:24
11:24
-1:12
40K
24.85 mi15:46:484:29:3910:519:47
11:27
+0:03
25.2M
25.20 mi15:51:154:34:0610:534:27
12:54
+1:27
Finish
26.22 mi16:03:204:46:1110:5512:05
11:51
-1:03

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

9:37 /mi

Average Pace

10:55 /mi

Slowest Pace

14:15 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:34:42

54% of race

Time at Steady Pace

57:48

20% of race

Time at Slower Pace

1:13:41

26% of race

Average Pace: 10:55 /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 mi11:47:3030:219:4630:21
9:46
#22826
10K
6.21 mi12:17:271:00:189:4229:57
9:38
#22914
15K
9.32 mi12:47:191:30:109:4029:52
9:37
#22797
20K
12.43 mi13:18:492:01:409:4731:30
10:08
#22912
Half
13.11 mi13:25:492:08:409:497:00
10:16
#22977
25K
15.53 mi13:51:512:34:429:5826:02
10:44
#23089
30K
18.64 mi14:31:043:13:5510:2439:13
12:37
#23616
20M
20.00 mi14:46:453:29:3610:2915:41
11:32
#23604
21M
21.00 mi15:01:003:43:5110:4014:15
14:15
#23779
35K
21.75 mi15:09:513:52:4210:428:51
11:50
#23827
23M
23.00 mi15:25:374:08:2810:4815:46
12:36
#23920
24M
24.00 mi15:37:014:19:5210:5011:24
11:24
#23920
40K
24.85 mi15:46:484:29:3910:519:47
11:27
#23879
25.2M
25.20 mi15:51:154:34:0610:534:27
12:54
#23884
Finish
26.22 mi16:03:204:46:1110:5512:05
11:51
#23948
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM55-59Seg. OverallSeg. MalesSeg. M55-59
5K3.11 mi3.11 mi22826135151351522555(Top 85%)13436(Top 89%)13436(Top 945%)
10K6.21 mi3.10 mi22914-8813582-6713582-6722907(Top 86%)13596(Top 90%)13596(Top 956%)
15K9.32 mi3.11 mi22797+11713544+3813544+3822555(Top 85%)13436(Top 89%)13436(Top 945%)
20K12.43 mi3.11 mi22912-11513589-4513589-4523179(Top 87%)13715(Top 90%)13715(Top 964%)
Half13.11 mi0.68 mi22977-6513624-3513624-3523769(Top 89%)13963(Top 92%)13963(Top 982%)
25K15.53 mi2.42 mi23089-11213663-3913663-3923569(Top 89%)13834(Top 91%)13834(Top 973%)
30K18.64 mi3.11 mi23616-52713885-22213885-22225110(Top 94%)14457(Top 95%)14457(Top 1017%)
20M20.00 mi1.36 mi23604+1213870+1513870+1523583(Top 89%)13730(Top 90%)13730(Top 966%)
21M21.00 mi1.00 mi23779-17513941-7113941-7125243(Top 95%)14490(Top 95%)14490(Top 1019%)
35K21.75 mi0.75 mi23827-4813958-1713958-1724503(Top 92%)14081(Top 93%)14081(Top 990%)
23M23.00 mi1.25 mi23920-9313992-3413992-3424674(Top 93%)14178(Top 93%)14178(Top 997%)
24M24.00 mi1.00 mi2392013978+1413978+1423736(Top 89%)13691(Top 90%)13691(Top 963%)
40K24.85 mi0.85 mi23879+4113953+2513953+2523119(Top 87%)13374(Top 88%)13374(Top 941%)
25.2M25.20 mi0.35 mi23884-513951+213951+223843(Top 90%)13711(Top 90%)13711(Top 964%)
Finish26.22 mi1.02 mi23948-6413972-2113972-2125103(Top 94%)14365(Top 95%)14365(Top 1010%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 85%
×21story building
+97ft-345ft

Overall

22555

Males

13436

M55-59

13436

5K→10K

3.1 - 6.2 mi

Top 86%
×5story building
+79ft-138ft

Overall

22907

Males

13596

M55-59

13596

10K→15K

6.2 - 9.3 mi

Top 85%
×3story building
+67ft-78ft

Overall

22555

Males

13436

M55-59

13436

15K→20K

9.3 - 12.4 mi

Top 87%
×5story building
+106ft-86ft

Overall

23179

Males

13715

M55-59

13715

20K→Half

12.4 - 13.1 mi

Top 89%
×2story building
+19ft-37ft

Overall

23769

Males

13963

M55-59

13963

Half→25K

13.1 - 15.5 mi

Top 89%
×4story building
+66ft-88ft

Overall

23569

Males

13834

M55-59

13834

25K→30K

15.5 - 18.6 mi

Top 94%
×9story building
+181ft-148ft

Overall

25110

Males

14457

M55-59

14457

30K→20M

18.6 - 20.0 mi

Top 89%
×5story building
+64ft-50ft

Overall

23583

Males

13730

M55-59

13730

20M→21M

20.0 - 21.0 mi

Top 95%
×8story building
+106ft-24ft

Overall

25243

Males

14490

M55-59

14490

21M→35K

21.0 - 21.8 mi

Top 92%
×7story building
+17ft-86ft

Overall

24503

Males

14081

M55-59

14081

35K→23M

21.8 - 23.0 mi

Top 93%
×5story building
+23ft-63ft

Overall

24674

Males

14178

M55-59

14178

23M→24M

23.0 - 24.0 mi

Top 89%
×6story building
+12ft-82ft

Overall

23736

Males

13691

M55-59

13691

24M→40K

24.0 - 24.9 mi

Top 87%
×1story
+6ft-20ft

Overall

23119

Males

13374

M55-59

13374

40K→25.2M

24.9 - 25.2 mi

Top 90%
×1story
+13ft-16ft

Overall

23843

Males

13711

M55-59

13711

25.2M→Finish

25.2 - 26.2 mi

Top 94%
×2story building
+22ft-21ft

Overall

25103

Males

14365

M55-59

14365

Passing Analysis

Category:
Athletes Passed
788
Passed By
1910
Net Change
-1122
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#22826
5K → 10K206294-88#22826#22914
10K → 15K20689+117#22914#22797
15K → 20K98213-115#22797#22912
20K → Half1277-65#22912#22977
Half → 25K59171-112#22977#23089
25K → 30K12539-527#23089#23616
30K → 20M6250+12#23616#23604
20M → 21M9184-175#23604#23779
21M → 35K1563-48#23779#23827
35K → 23M16109-93#23827#23920
23M → 24M25250#23920#23920
24M → 40K509+41#23920#23879
40K → 25.2M813-5#23879#23884
25.2M → Finish1074-64#23884#23948
TOTALS7881910-1122
📊

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