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BOSTON MARATHON 2023

Keith Steinbrecher

Bib: 1176•M

AL

0:00
0:00
/ mi
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Overall
#0 / 26622
Top 1%
Gender (Male)
#0 / 15176
Top 2%
Division (M18-39)
#0 / 5285
Top 5%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
18:25
Rank: #577
Start → 5K
18:25 | 5:56/mi
10K· 6.21 mi
36:26
Rank: #492 (+85)
5K → 10K
18:01 | 5:48/mi
15K· 9.32 mi
54:27
Rank: #433 (+59)
10K → 15K
18:01 | 5:48/mi
20K· 12.43 mi
1:12:37
Rank: #409 (+24)
15K → 20K
18:10 | 5:51/mi
Half· 13.11 mi
1:16:33
Rank: #406 (+3)
20K → Half
3:56 | 5:46/mi
25K· 15.53 mi
1:30:39
Rank: #386 (+20)
Half → 25K
14:06 | 5:49/mi
30K· 18.64 mi
1:49:06
Rank: #362 (+24)
25K → 30K
18:27 | 5:56/mi
20M
1:57:23
Rank: #366 (-4)
30K → 20M
8:17 | 6:06/mi
21M
2:03:55
Rank: #370 (-4)
20M → 21M
6:32 | 6:32/mi
35K· 21.75 mi
2:08:26
Rank: #378 (-8)
21M → 35K
4:31 | 6:02/mi
23M
2:16:20
Rank: #391 (-13)
35K → 23M
7:54 | 6:19/mi
24M
2:22:13
Rank: #381 (+10)
23M → 24M
5:53 | 5:53/mi
40K· 24.85 mi
2:27:20
Rank: #370 (+11)
24M → 40K
5:07 | 5:59/mi
25.2M
2:29:37
Rank: #370
40K → 25.2M
2:17 | 6:37/mi
Finish· 26.22 mi
2:35:30
Rank: #356 (+14)
25.2M → Finish
5:53 | 5:46/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:16:33
Pace5:50 /mi
2nd Half
Distance13.11 mi
Time1:18:57
Pace6:01 /mi
📊Positive Split: 3.1% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:18:5718:255:5618:25
5:56
-
10K
6.21 mi10:36:5836:265:5218:01
5:48
-0:08
15K
9.32 mi10:54:5954:275:5118:01
5:48
0:00
20K
12.43 mi11:13:091:12:375:5118:10
5:51
+0:03
Half
13.11 mi11:17:051:16:335:503:56
5:46
-0:05
25K
15.53 mi11:31:111:30:395:5014:06
5:49
+0:03
30K
18.64 mi11:49:381:49:065:5118:27
5:56
+0:07
20M
20.00 mi11:57:551:57:235:528:17
6:06
+0:10
21M
21.00 mi12:04:272:03:555:546:32
6:32
+0:26
35K
21.75 mi12:08:582:08:265:544:31
6:02
-0:30
23M
23.00 mi12:16:522:16:205:567:54
6:19
+0:17
24M
24.00 mi12:22:452:22:135:565:53
5:53
-0:26
40K
24.85 mi12:27:522:27:205:565:07
5:59
+0:06
25.2M
25.20 mi12:30:092:29:375:562:17
6:37
+0:38
Finish
26.22 mi12:36:022:35:305:565:53
5:46
-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

5:46 /mi

Average Pace

5:56 /mi

Slowest Pace

6:37 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:26:41

94% of race

Time at Steady Pace

8:49

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 5:56 /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 mi10:18:5718:255:5618:25
5:56
#577
10K
6.21 mi10:36:5836:265:5218:01
5:48
#492
15K
9.32 mi10:54:5954:275:5118:01
5:48
#433
20K
12.43 mi11:13:091:12:375:5118:10
5:51
#409
Half
13.11 mi11:17:051:16:335:503:56
5:46
#406
25K
15.53 mi11:31:111:30:395:5014:06
5:49
#386
30K
18.64 mi11:49:381:49:065:5118:27
5:56
#362
20M
20.00 mi11:57:551:57:235:528:17
6:06
#366
21M
21.00 mi12:04:272:03:555:546:32
6:32
#370
35K
21.75 mi12:08:582:08:265:544:31
6:02
#378
23M
23.00 mi12:16:522:16:205:567:54
6:19
#391
24M
24.00 mi12:22:452:22:135:565:53
5:53
#381
40K
24.85 mi12:27:522:27:205:565:07
5:59
#370
25.2M
25.20 mi12:30:092:29:375:562:17
6:37
#370
Finish
26.22 mi12:36:022:35:305:565:53
5:46
#356
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi577534534371(Top 1%)337(Top 2%)337(Top 6%)
10K6.21 mi3.10 mi492+85454+80454+80426(Top 2%)391(Top 3%)391(Top 7%)
15K9.32 mi3.11 mi433+59398+56398+56371(Top 1%)337(Top 2%)337(Top 6%)
20K12.43 mi3.11 mi409+24374+24374+24350(Top 1%)318(Top 2%)318(Top 6%)
Half13.11 mi0.68 mi406+3372+2372+2353(Top 1%)324(Top 2%)324(Top 6%)
25K15.53 mi2.42 mi386+20354+18354+18299(Top 1%)271(Top 2%)271(Top 5%)
30K18.64 mi3.11 mi362+24330+24330+24306(Top 1%)281(Top 2%)281(Top 5%)
20M20.00 mi1.36 mi366-4334-4334-4469(Top 2%)435(Top 3%)435(Top 8%)
21M21.00 mi1.00 mi370-4338-4338-4700(Top 3%)659(Top 4%)659(Top 12%)
35K21.75 mi0.75 mi378-8346-8346-8745(Top 3%)704(Top 5%)704(Top 13%)
23M23.00 mi1.25 mi391-13358-12358-12848(Top 3%)804(Top 5%)804(Top 15%)
24M24.00 mi1.00 mi381+10349+9349+9362(Top 1%)336(Top 2%)336(Top 6%)
40K24.85 mi0.85 mi370+11338+11338+11321(Top 1%)297(Top 2%)297(Top 6%)
25.2M25.20 mi0.35 mi370338338667(Top 3%)632(Top 4%)632(Top 12%)
Finish26.22 mi1.02 mi356+14324+14324+14322(Top 1%)304(Top 2%)304(Top 6%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 1%
×21stories
+97ft-345ft

Overall

371

Males

337

M18-39

337

5K→10K

3.1 - 6.2 mi

Top 2%
×5stories
+79ft-138ft

Overall

426

Males

391

M18-39

391

10K→15K

6.2 - 9.3 mi

Top 1%
×3stories
+67ft-78ft

Overall

371

Males

337

M18-39

337

15K→20K

9.3 - 12.4 mi

Top 1%
×5stories
+106ft-86ft

Overall

350

Males

318

M18-39

318

20K→Half

12.4 - 13.1 mi

Top 1%
×2stories
+19ft-37ft

Overall

353

Males

324

M18-39

324

Half→25K

13.1 - 15.5 mi

Top 1%
×4stories
+66ft-88ft

Overall

299

Males

271

M18-39

271

25K→30K

15.5 - 18.6 mi

Top 1%
×9stories
+181ft-148ft

Overall

306

Males

281

M18-39

281

30K→20M

18.6 - 20.0 mi

Top 2%
×5stories
+64ft-50ft

Overall

469

Males

435

M18-39

435

20M→21M

20.0 - 21.0 mi

Top 3%
×8stories
+106ft-24ft

Overall

700

Males

659

M18-39

659

21M→35K

21.0 - 21.8 mi

Top 3%
×7stories
+17ft-86ft

Overall

745

Males

704

M18-39

704

35K→23M

21.8 - 23.0 mi

Top 3%
×5stories
+23ft-63ft

Overall

848

Males

804

M18-39

804

23M→24M

23.0 - 24.0 mi

Top 1%
×6stories
+12ft-82ft

Overall

362

Males

336

M18-39

336

24M→40K

24.0 - 24.9 mi

Top 1%
×1story
+6ft-20ft

Overall

321

Males

297

M18-39

297

40K→25.2M

24.9 - 25.2 mi

Top 3%
×1story
+13ft-16ft

Overall

667

Males

632

M18-39

632

25.2M→Finish

25.2 - 26.2 mi

Top 1%
×2stories
+22ft-21ft

Overall

322

Males

304

M18-39

304

Passing Analysis

Category:
Athletes Passed
295
Passed By
74
Net Change
+221
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#577
5K → 10K927+85#577#492
10K → 15K601+59#492#433
15K → 20K284+24#433#409
20K → Half41+3#409#406
Half → 25K200+20#406#386
25K → 30K262+24#386#362
30K → 20M59-4#362#366
20M → 21M48-4#366#370
21M → 35K210-8#370#378
35K → 23M619-13#378#391
23M → 24M133+10#391#381
24M → 40K132+11#381#370
40K → 25.2M440#370#370
25.2M → Finish184+14#370#356
TOTALS29574+221
📊

Passing Visuals

Category:
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🔥Passing Intensity

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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