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BOSTON MARATHON 2023

Greg Chatfield

Bib: 13515•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 (M50-54)
#0 / 2052
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
7:55/mi
24:36
↑ 97↓ 3451.5%
10K· 6.21 mi
8:19/mi
50:25
↑ 79↓ 1380.4%
15K· 9.32 mi
8:45/mi
1:17:37
↑ 67↓ 78
20K· 12.43 mi
9:11/mi
1:46:08
↑ 106↓ 860.1%
Half· 13.11 mi
9:20/mi
1:52:30
↑ 19↓ 370.5%
25K· 15.53 mi
9:26/mi
2:15:22
↑ 66↓ 880.2%
30K· 18.64 mi
9:49/mi
2:45:52
↑ 181↓ 1480.2%
20M
9:49/mi
2:59:13
↑ 64↓ 500.2%
21M
14:33/mi
3:13:46
↑ 106↓ 241.6%
35K· 21.75 mi
9:11/mi
3:20:38
↑ 17↓ 861.7%
23M
11:01/mi
3:34:26
↑ 23↓ 630.6%
24M
10:09/mi
3:44:35
↓ 821.3%
40K· 24.85 mi
10:30/mi
3:53:34
↓ 200.3%
25.2M
10:50/mi
3:57:18
↑ 13↓ 160.2%
Finish· 26.22 mi
9:29/mi
4:06:58
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:52:30
Pace8:35 /mi
2nd Half
Distance13.11 mi
Time2:14:28
Pace10:15 /mi
📊Positive Split: 19.5% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:53:1124:367:5524:36
7:55
-
10K
6.21 mi11:19:0050:258:0725:49
8:19
+0:24
15K
9.32 mi11:46:121:17:378:2027:12
8:45
+0:26
20K
12.43 mi12:14:431:46:088:3228:31
9:11
+0:26
Half
13.11 mi12:21:051:52:308:356:22
9:20
+0:09
25K
15.53 mi12:43:572:15:228:4322:52
9:26
+0:06
30K
18.64 mi13:14:272:45:528:5430:30
9:49
+0:23
20M
20.00 mi13:27:482:59:138:5813:21
9:49
0:00
21M
21.00 mi13:42:213:13:469:1414:33
14:33
+4:44
35K
21.75 mi13:49:133:20:389:146:52
9:11
-5:22
23M
23.00 mi14:03:013:34:269:1913:48
11:01
+1:50
24M
24.00 mi14:13:103:44:359:2110:09
10:09
-0:52
40K
24.85 mi14:22:093:53:349:248:59
10:30
+0:21
25.2M
25.20 mi14:25:533:57:189:253:44
10:50
+0:20
Finish
26.22 mi14:35:334:06:589:269:40
9:29
-1:21

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

7:55 /mi

Average Pace

9:26 /mi

Slowest Pace

14:33 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

50:25

20% of race

Time at Steady Pace

2:35:29

63% of race

Time at Slower Pace

41:04

17% of race

Average Pace: 9:25 /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 mi10:53:1124:367:5524:36
7:55
#13397
10K
6.21 mi11:19:0050:258:0725:49
8:19
#15212
15K
9.32 mi11:46:121:17:378:2027:12
8:45
#16707
20K
12.43 mi12:14:431:46:088:3228:31
9:11
#17828
Half
13.11 mi12:21:051:52:308:356:22
9:20
#18094
25K
15.53 mi12:43:572:15:228:4322:52
9:26
#18652
30K
18.64 mi13:14:272:45:528:5430:30
9:49
#19091
20M
20.00 mi13:27:482:59:138:5813:21
9:49
#19176
21M
21.00 mi13:42:213:13:469:1414:33
14:33
#20062
35K
21.75 mi13:49:133:20:389:146:52
9:11
#20005
23M
23.00 mi14:03:013:34:269:1913:48
11:01
#20209
24M
24.00 mi14:13:103:44:359:2110:09
10:09
#20266
40K
24.85 mi14:22:093:53:349:248:59
10:30
#20285
25.2M
25.20 mi14:25:533:57:189:253:44
10:50
#20281
Finish
26.22 mi14:35:334:06:589:269:40
9:29
#20261
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM50-54Seg. OverallSeg. MalesSeg. M50-54
5K3.11 mi3.11 mi133979717971719260(Top 72%)11994(Top 79%)11994(Top 585%)
10K6.21 mi3.10 mi15212-181510417-70010417-70016994(Top 64%)11108(Top 73%)11108(Top 541%)
15K9.32 mi3.11 mi16707-149510952-53510952-53519260(Top 72%)11994(Top 79%)11994(Top 585%)
20K12.43 mi3.11 mi17828-112111388-43611388-43620477(Top 77%)12508(Top 82%)12508(Top 610%)
Half13.11 mi0.68 mi18094-26611508-12011508-12021593(Top 81%)12998(Top 86%)12998(Top 633%)
25K15.53 mi2.42 mi18652-55811705-19711705-19720604(Top 77%)12533(Top 83%)12533(Top 611%)
30K18.64 mi3.11 mi19091-43911883-17811883-17820494(Top 77%)12419(Top 82%)12419(Top 605%)
20M20.00 mi1.36 mi19176-8511900-1711900-1719927(Top 75%)12094(Top 80%)12094(Top 589%)
21M21.00 mi1.00 mi20062-88612259-35912259-35925452(Top 96%)14596(Top 96%)14596(Top 711%)
35K21.75 mi0.75 mi20005+5712230+2912230+2918651(Top 70%)11444(Top 75%)11444(Top 558%)
23M23.00 mi1.25 mi20209-20412302-7212302-7222381(Top 84%)13099(Top 86%)13099(Top 638%)
24M24.00 mi1.00 mi20266-5712317-1512317-1521177(Top 80%)12498(Top 82%)12498(Top 609%)
40K24.85 mi0.85 mi20285-1912313+412313+421220(Top 80%)12462(Top 82%)12462(Top 607%)
25.2M25.20 mi0.35 mi20281+412305+812305+820020(Top 75%)11928(Top 79%)11928(Top 581%)
Finish26.22 mi1.02 mi20261+2012293+1212293+1220057(Top 75%)12004(Top 79%)12004(Top 585%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 72%
×21story building
+97ft-345ft

Overall

19260

Males

11994

M50-54

11994

5K→10K

3.1 - 6.2 mi

Top 64%
×5story building
+79ft-138ft

Overall

16994

Males

11108

M50-54

11108

10K→15K

6.2 - 9.3 mi

Top 72%
×3story building
+67ft-78ft

Overall

19260

Males

11994

M50-54

11994

15K→20K

9.3 - 12.4 mi

Top 77%
×5story building
+106ft-86ft

Overall

20477

Males

12508

M50-54

12508

20K→Half

12.4 - 13.1 mi

Top 81%
×2story building
+19ft-37ft

Overall

21593

Males

12998

M50-54

12998

Half→25K

13.1 - 15.5 mi

Top 77%
×4story building
+66ft-88ft

Overall

20604

Males

12533

M50-54

12533

25K→30K

15.5 - 18.6 mi

Top 77%
×9story building
+181ft-148ft

Overall

20494

Males

12419

M50-54

12419

30K→20M

18.6 - 20.0 mi

Top 75%
×5story building
+64ft-50ft

Overall

19927

Males

12094

M50-54

12094

20M→21M

20.0 - 21.0 mi

Top 96%
×8story building
+106ft-24ft

Overall

25452

Males

14596

M50-54

14596

21M→35K

21.0 - 21.8 mi

Top 70%
×7story building
+17ft-86ft

Overall

18651

Males

11444

M50-54

11444

35K→23M

21.8 - 23.0 mi

Top 84%
×5story building
+23ft-63ft

Overall

22381

Males

13099

M50-54

13099

23M→24M

23.0 - 24.0 mi

Top 80%
×6story building
+12ft-82ft

Overall

21177

Males

12498

M50-54

12498

24M→40K

24.0 - 24.9 mi

Top 80%
×1story
+6ft-20ft

Overall

21220

Males

12462

M50-54

12462

40K→25.2M

24.9 - 25.2 mi

Top 75%
×1story
+13ft-16ft

Overall

20020

Males

11928

M50-54

11928

25.2M→Finish

25.2 - 26.2 mi

Top 75%
×2story building
+22ft-21ft

Overall

20057

Males

12004

M50-54

12004

Passing Analysis

Category:
Athletes Passed
442
Passed By
7306
Net Change
-6864
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#13397
5K → 10K131828-1815#13397#15212
10K → 15K91504-1495#15212#16707
15K → 20K261147-1121#16707#17828
20K → Half4270-266#17828#18094
Half → 25K33591-558#18094#18652
25K → 30K63502-439#18652#19091
30K → 20M61146-85#19091#19176
20M → 21M1887-886#19176#20062
21M → 35K7215+57#20062#20005
35K → 23M25229-204#20005#20209
23M → 24M2986-57#20209#20266
24M → 40K3352-19#20266#20285
40K → 25.2M2117+4#20285#20281
25.2M → Finish5232+20#20281#20261
TOTALS4427306-6864
📊

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