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BOSTON MARATHON 2023

Gerwin De Groot

Bib: 5395•M

0:00
0:00
/ mi
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Overall
#0 / 26622
Gender (Male)
#0 / 15176
Division (M18-39)
#0 / 5285
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
8:10/mi
25:21
↑ 97↓ 3451.5%
10K· 6.21 mi
8:09/mi
50:40
↑ 79↓ 1380.4%
15K· 9.32 mi
8:21/mi
1:16:35
↑ 67↓ 78
20K· 12.43 mi
8:23/mi
1:42:39
↑ 106↓ 860.1%
Half· 13.11 mi
7:58/mi
1:48:05
↑ 19↓ 370.5%
25K· 15.53 mi
8:19/mi
2:08:14
↑ 66↓ 880.2%
30K· 18.64 mi
8:33/mi
2:34:49
↑ 181↓ 1480.2%
20M
8:30/mi
2:46:22
↑ 64↓ 500.2%
21M
8:54/mi
2:55:16
↑ 106↓ 241.6%
35K· 21.75 mi
8:03/mi
3:01:17
↑ 17↓ 861.7%
23M
8:24/mi
3:11:48
↑ 23↓ 630.6%
24M
8:12/mi
3:20:00
↓ 821.3%
40K· 24.85 mi
8:09/mi
3:26:58
↓ 200.3%
25.2M
8:39/mi
3:29:57
↑ 13↓ 160.2%
Finish· 26.22 mi
7:48/mi
3:37:54
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:48:05
Pace8:15 /mi
2nd Half
Distance13.11 mi
Time1:49:49
Pace8:23 /mi
📊Positive Split: 1.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:28:3025:218:1025:21
8:10
-
10K
6.21 mi10:53:4950:408:0925:19
8:09
-0:01
15K
9.32 mi11:19:441:16:358:1325:55
8:21
+0:12
20K
12.43 mi11:45:481:42:398:1626:04
8:23
+0:02
Half
13.11 mi11:51:141:48:058:155:26
7:58
-0:25
25K
15.53 mi12:11:232:08:148:1520:09
8:19
+0:21
30K
18.64 mi12:37:582:34:498:1826:35
8:33
+0:14
20M
20.00 mi12:49:312:46:228:1911:33
8:30
-0:03
21M
21.00 mi12:58:252:55:168:218:54
8:54
+0:24
35K
21.75 mi13:04:263:01:178:206:01
8:03
-0:51
23M
23.00 mi13:14:573:11:488:2010:31
8:24
+0:21
24M
24.00 mi13:23:093:20:008:208:12
8:12
-0:12
40K
24.85 mi13:30:073:26:588:206:58
8:09
-0:03
25.2M
25.20 mi13:33:063:29:578:202:59
8:39
+0:30
Finish
26.22 mi13:41:033:37:548:197:57
7:48
-0:51

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

7:48 /mi

Average Pace

8:19 /mi

Slowest Pace

8:54 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:26:01

95% of race

Time at Steady Pace

11:53

5% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:19 /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 mi10:28:3025:218:1025:21
8:10
#15136
10K
6.21 mi10:53:4950:408:0925:19
8:09
#15483
15K
9.32 mi11:19:441:16:358:1325:55
8:21
#15947
20K
12.43 mi11:45:481:42:398:1626:04
8:23
#15975
Half
13.11 mi11:51:141:48:058:155:26
7:58
#15879
25K
15.53 mi12:11:232:08:148:1520:09
8:19
#15718
30K
18.64 mi12:37:582:34:498:1826:35
8:33
#15510
20M
20.00 mi12:49:312:46:228:1911:33
8:30
#15353
21M
21.00 mi12:58:252:55:168:218:54
8:54
#15176
35K
21.75 mi13:04:263:01:178:206:01
8:03
#15083
23M
23.00 mi13:14:573:11:488:2010:31
8:24
#14919
24M
24.00 mi13:23:093:20:008:208:12
8:12
#14793
40K
24.85 mi13:30:073:26:588:206:58
8:09
#14648
25.2M
25.20 mi13:33:063:29:578:202:59
8:39
#14566
Finish
26.22 mi13:41:033:37:548:197:57
7:48
#14408
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi15136103851038516784(Top 63%)10979(Top 72%)10979(Top 208%)
10K6.21 mi3.10 mi15483-34710504-11910504-11915874(Top 60%)10661(Top 70%)10661(Top 202%)
15K9.32 mi3.11 mi15947-46410680-17610680-17616784(Top 63%)10979(Top 72%)10979(Top 208%)
20K12.43 mi3.11 mi15975-2810663+1710663+1716177(Top 61%)10697(Top 70%)10697(Top 202%)
Half13.11 mi0.68 mi15879+9610625+3810625+3814034(Top 53%)9917(Top 65%)9917(Top 188%)
25K15.53 mi2.42 mi15718+16110538+8710538+8715008(Top 56%)10146(Top 67%)10146(Top 192%)
30K18.64 mi3.11 mi15510+20810410+12810410+12814646(Top 55%)9910(Top 65%)9910(Top 188%)
20M20.00 mi1.36 mi15353+15710334+7610334+7613609(Top 51%)9413(Top 62%)9413(Top 178%)
21M21.00 mi1.00 mi15176+17710248+8610248+8612837(Top 48%)8965(Top 59%)8965(Top 170%)
35K21.75 mi0.75 mi15083+9310195+5310195+5312420(Top 47%)8754(Top 58%)8754(Top 166%)
23M23.00 mi1.25 mi14919+16410116+7910116+7912566(Top 47%)8721(Top 57%)8721(Top 165%)
24M24.00 mi1.00 mi14793+12610045+7110045+7112584(Top 47%)8674(Top 57%)8674(Top 164%)
40K24.85 mi0.85 mi14648+1459956+899956+8911020(Top 41%)7859(Top 52%)7859(Top 149%)
25.2M25.20 mi0.35 mi14566+829919+379919+3710454(Top 39%)7552(Top 50%)7552(Top 143%)
Finish26.22 mi1.02 mi14408+1589842+779842+7710685(Top 40%)7650(Top 50%)7650(Top 145%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 63%
×21story building
+97ft-345ft

Overall

16784

Males

10979

M18-39

10979

5K→10K

3.1 - 6.2 mi

Top 60%
×5story building
+79ft-138ft

Overall

15874

Males

10661

M18-39

10661

10K→15K

6.2 - 9.3 mi

Top 63%
×3story building
+67ft-78ft

Overall

16784

Males

10979

M18-39

10979

15K→20K

9.3 - 12.4 mi

Top 61%
×5story building
+106ft-86ft

Overall

16177

Males

10697

M18-39

10697

20K→Half

12.4 - 13.1 mi

Top 53%
×2story building
+19ft-37ft

Overall

14034

Males

9917

M18-39

9917

Half→25K

13.1 - 15.5 mi

Top 56%
×4story building
+66ft-88ft

Overall

15008

Males

10146

M18-39

10146

25K→30K

15.5 - 18.6 mi

Top 55%
×9story building
+181ft-148ft

Overall

14646

Males

9910

M18-39

9910

30K→20M

18.6 - 20.0 mi

Top 51%
×5story building
+64ft-50ft

Overall

13609

Males

9413

M18-39

9413

20M→21M

20.0 - 21.0 mi

Top 48%
×8story building
+106ft-24ft

Overall

12837

Males

8965

M18-39

8965

21M→35K

21.0 - 21.8 mi

Top 47%
×7story building
+17ft-86ft

Overall

12420

Males

8754

M18-39

8754

35K→23M

21.8 - 23.0 mi

Top 47%
×5story building
+23ft-63ft

Overall

12566

Males

8721

M18-39

8721

23M→24M

23.0 - 24.0 mi

Top 47%
×6story building
+12ft-82ft

Overall

12584

Males

8674

M18-39

8674

24M→40K

24.0 - 24.9 mi

Top 41%
×1story
+6ft-20ft

Overall

11020

Males

7859

M18-39

7859

40K→25.2M

24.9 - 25.2 mi

Top 39%
×1story
+13ft-16ft

Overall

10454

Males

7552

M18-39

7552

25.2M→Finish

25.2 - 26.2 mi

Top 40%
×2story building
+22ft-21ft

Overall

10685

Males

7650

M18-39

7650

Passing Analysis

Category:
Athletes Passed
2152
Passed By
1424
Net Change
+728
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#15136
5K → 10K153500-347#15136#15483
10K → 15K67531-464#15483#15947
15K → 20K156184-28#15947#15975
20K → Half1026+96#15975#15879
Half → 25K20948+161#15879#15718
25K → 30K28678+208#15718#15510
30K → 20M18023+157#15510#15353
20M → 21M18710+177#15353#15176
21M → 35K996+93#15176#15083
35K → 23M1739+164#15083#14919
23M → 24M13913+126#14919#14793
24M → 40K1549+145#14793#14648
40K → 25.2M831+82#14648#14566
25.2M → Finish1646+158#14566#14408
TOTALS21521424+728
📊

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