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BOSTON MARATHON 2023

Justin Grammens

Bib: 13553•M

MN

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Top 39%
Gender (Male)
#0 / 15176
Masters (Masters Men)
#0 / 9891
Top 43%
Division (M45-49)
#0 / 2252
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
7:46/mi
24:07
↑ 97↓ 3451.5%
10K· 6.21 mi
7:38/mi
47:51
↑ 79↓ 1380.4%
15K· 9.32 mi
7:37/mi
1:11:30
↑ 67↓ 78
20K· 12.43 mi
7:38/mi
1:35:13
↑ 106↓ 860.1%
Half· 13.11 mi
7:29/mi
1:40:19
↑ 19↓ 370.5%
25K· 15.53 mi
7:37/mi
1:58:48
↑ 66↓ 880.2%
30K· 18.64 mi
8:06/mi
2:23:59
↑ 181↓ 1480.2%
20M
8:01/mi
2:34:52
↑ 64↓ 500.2%
21M
8:25/mi
2:43:17
↑ 106↓ 241.6%
35K· 21.75 mi
7:40/mi
2:49:01
↑ 17↓ 861.7%
23M
7:54/mi
2:58:54
↑ 23↓ 630.6%
24M
7:42/mi
3:06:36
↓ 821.3%
40K· 24.85 mi
8:05/mi
3:13:31
↓ 200.3%
25.2M
8:45/mi
3:16:32
↑ 13↓ 160.2%
Finish· 26.22 mi
7:39/mi
3:24:20
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:40:19
Pace7:39 /mi
2nd Half
Distance13.11 mi
Time1:44:01
Pace7:56 /mi
📊Positive Split: 3.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:52:3024:077:4624:07
7:46
-
10K
6.21 mi11:16:1447:517:4223:44
7:38
-0:08
15K
9.32 mi11:39:531:11:307:4023:39
7:37
-0:01
20K
12.43 mi12:03:361:35:137:4023:43
7:38
+0:01
Half
13.11 mi12:08:421:40:197:395:06
7:29
-0:09
25K
15.53 mi12:27:111:58:487:3918:29
7:37
+0:08
30K
18.64 mi12:52:222:23:597:4325:11
8:06
+0:29
20M
20.00 mi13:03:152:34:527:4510:53
8:01
-0:05
21M
21.00 mi13:11:402:43:177:478:25
8:25
+0:24
35K
21.75 mi13:17:242:49:017:465:44
7:40
-0:45
23M
23.00 mi13:27:172:58:547:479:53
7:54
+0:14
24M
24.00 mi13:34:593:06:367:477:42
7:42
-0:12
40K
24.85 mi13:41:543:13:317:476:55
8:05
+0:23
25.2M
25.20 mi13:44:553:16:327:483:01
8:45
+0:40
Finish
26.22 mi13:52:433:24:207:487:48
7:39
-1:06

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

7:29 /mi

Average Pace

7:48 /mi

Slowest Pace

8:45 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:12:54

94% of race

Time at Steady Pace

11:26

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:48 /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 mi10:52:3024:077:4624:07
7:46
#12017
10K
6.21 mi11:16:1447:517:4223:44
7:38
#11810
15K
9.32 mi11:39:531:11:307:4023:39
7:37
#11537
20K
12.43 mi12:03:361:35:137:4023:43
7:38
#11198
Half
13.11 mi12:08:421:40:197:395:06
7:29
#11136
25K
15.53 mi12:27:111:58:487:3918:29
7:37
#10882
30K
18.64 mi12:52:222:23:597:4325:11
8:06
#10953
20M
20.00 mi13:03:152:34:527:4510:53
8:01
#10871
21M
21.00 mi13:11:402:43:177:478:25
8:25
#10815
35K
21.75 mi13:17:242:49:017:465:44
7:40
#10753
23M
23.00 mi13:27:172:58:547:479:53
7:54
#10623
24M
24.00 mi13:34:593:06:367:477:42
7:42
#10541
40K
24.85 mi13:41:543:13:317:476:55
8:05
#10522
25.2M
25.20 mi13:44:553:16:327:483:01
8:45
#10518
Finish
26.22 mi13:52:433:24:207:487:48
7:39
#10459
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM45-49Seg. OverallSeg. MalesSeg. M45-49
5K3.11 mi3.11 mi120179121912111115(Top 42%)8684(Top 57%)8684(Top 386%)
10K6.21 mi3.10 mi11810+2079022+999022+9911668(Top 44%)8966(Top 59%)8966(Top 398%)
15K9.32 mi3.11 mi11537+2738894+1288894+12811115(Top 42%)8684(Top 57%)8684(Top 386%)
20K12.43 mi3.11 mi11198+3398750+1448750+14410342(Top 39%)8259(Top 54%)8259(Top 367%)
Half13.11 mi0.68 mi11136+628716+348716+3410000(Top 38%)8110(Top 53%)8110(Top 360%)
25K15.53 mi2.42 mi10882+2548576+1408576+1409728(Top 37%)7841(Top 52%)7841(Top 348%)
30K18.64 mi3.11 mi10953-718559+178559+1711668(Top 44%)8648(Top 57%)8648(Top 384%)
20M20.00 mi1.36 mi10871+828490+698490+6910307(Top 39%)7920(Top 52%)7920(Top 352%)
21M21.00 mi1.00 mi10815+568436+548436+549950(Top 37%)7579(Top 50%)7579(Top 337%)
35K21.75 mi0.75 mi10753+628383+538383+539689(Top 36%)7461(Top 49%)7461(Top 331%)
23M23.00 mi1.25 mi10623+1308292+918292+919024(Top 34%)6978(Top 46%)6978(Top 310%)
24M24.00 mi1.00 mi10541+828222+708222+709076(Top 34%)6932(Top 46%)6932(Top 308%)
40K24.85 mi0.85 mi10522+198184+388184+3810620(Top 40%)7661(Top 50%)7661(Top 340%)
25.2M25.20 mi0.35 mi10518+48175+98175+910956(Top 41%)7767(Top 51%)7767(Top 345%)
Finish26.22 mi1.02 mi10459+598118+578118+579643(Top 36%)7094(Top 47%)7094(Top 315%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 42%
×21story building
+97ft-345ft

Overall

11115

Males

8684

M45-49

8684

5K→10K

3.1 - 6.2 mi

Top 44%
×5story building
+79ft-138ft

Overall

11668

Males

8966

M45-49

8966

10K→15K

6.2 - 9.3 mi

Top 42%
×3story building
+67ft-78ft

Overall

11115

Males

8684

M45-49

8684

15K→20K

9.3 - 12.4 mi

Top 39%
×5story building
+106ft-86ft

Overall

10342

Males

8259

M45-49

8259

20K→Half

12.4 - 13.1 mi

Top 38%
×2story building
+19ft-37ft

Overall

10000

Males

8110

M45-49

8110

Half→25K

13.1 - 15.5 mi

Top 37%
×4story building
+66ft-88ft

Overall

9728

Males

7841

M45-49

7841

25K→30K

15.5 - 18.6 mi

Top 44%
×9story building
+181ft-148ft

Overall

11668

Males

8648

M45-49

8648

30K→20M

18.6 - 20.0 mi

Top 39%
×5story building
+64ft-50ft

Overall

10307

Males

7920

M45-49

7920

20M→21M

20.0 - 21.0 mi

Top 37%
×8story building
+106ft-24ft

Overall

9950

Males

7579

M45-49

7579

21M→35K

21.0 - 21.8 mi

Top 36%
×7story building
+17ft-86ft

Overall

9689

Males

7461

M45-49

7461

35K→23M

21.8 - 23.0 mi

Top 34%
×5story building
+23ft-63ft

Overall

9024

Males

6978

M45-49

6978

23M→24M

23.0 - 24.0 mi

Top 34%
×6story building
+12ft-82ft

Overall

9076

Males

6932

M45-49

6932

24M→40K

24.0 - 24.9 mi

Top 40%
×1story
+6ft-20ft

Overall

10620

Males

7661

M45-49

7661

40K→25.2M

24.9 - 25.2 mi

Top 41%
×1story
+13ft-16ft

Overall

10956

Males

7767

M45-49

7767

25.2M→Finish

25.2 - 26.2 mi

Top 36%
×2story building
+22ft-21ft

Overall

9643

Males

7094

M45-49

7094

Passing Analysis

Category:
Athletes Passed
2416*
Passed By
858
Net Change
+1558
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#12017
5K → 10K417210+207#12017#11810
10K → 15K34875+273#11810#11537
15K → 20K37233+339#11537#11198
20K → Half653+62#11198#11136
Half → 25K26915+254#11136#10882
25K → 30K160231-71#10882#10953
30K → 20M129*47+82#10953#10871
20M → 21M9943+56#10871#10815
21M → 35K7917+62#10815#10753
35K → 23M15424+130#10753#10623
23M → 24M11432+82#10623#10541
24M → 40K7758+19#10541#10522
40K → 25.2M2925+4#10522#10518
25.2M → Finish10445+59#10518#10459
TOTALS2416*858+1558

* Includes athletes who did not complete a segment (DNF/DNQ).

📊

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