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BOSTON MARATHON 2023

Jacob Alexander

Bib: 642•M

CO

0:00
0:00
/ mi
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Overall
#0 / 26622
Top 1.0%
Gender (Male)
#0 / 15176
Top 2%
Division (M18-39)
#0 / 5285
Top 4%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
18:39
Rank: #690
Start → 5K
18:39 | 6:00/mi
10K· 6.21 mi
36:41
Rank: #561 (+129)
5K → 10K
18:02 | 5:48/mi
15K· 9.32 mi
54:45
Rank: #493 (+68)
10K → 15K
18:04 | 5:49/mi
20K· 12.43 mi
1:12:57
Rank: #441 (+52)
15K → 20K
18:12 | 5:51/mi
Half· 13.11 mi
1:16:55
Rank: #440 (+1)
20K → Half
3:58 | 5:49/mi
25K· 15.53 mi
1:31:02
Rank: #417 (+23)
Half → 25K
14:07 | 5:49/mi
30K· 18.64 mi
1:49:26
Rank: #379 (+38)
25K → 30K
18:24 | 5:55/mi
20M
1:57:21
Rank: #364 (+15)
30K → 20M
7:55 | 5:50/mi
21M
2:03:31
Rank: #344 (+20)
20M → 21M
6:10 | 6:10/mi
35K· 21.75 mi
2:07:42
Rank: #333 (+11)
21M → 35K
4:11 | 5:36/mi
23M
2:15:03
Rank: #314 (+19)
35K → 23M
7:21 | 5:52/mi
24M
2:20:48
Rank: #306 (+8)
23M → 24M
5:45 | 5:45/mi
40K· 24.85 mi
2:25:44
Rank: #282 (+24)
24M → 40K
4:56 | 5:46/mi
25.2M
2:27:50
Rank: #278 (+4)
40K → 25.2M
2:06 | 6:05/mi
Finish· 26.22 mi
2:33:26
Rank: #254 (+24)
25.2M → Finish
5:36 | 5:30/mi

The Course

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Half Splits

1st Half· via Half⚖️ Balanced
Distance13.11 mi
Time1:16:55
Pace5:52 /mi
2nd Half⚖️ Balanced
Distance13.11 mi
Time1:16:31
Pace5:50 /mi
📊Even Split: Consistent pacing between halves

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:18:4918:396:0018:39
6:00
-
10K
6.21 mi10:36:5136:415:5418:02
5:48
-0:12
15K
9.32 mi10:54:5554:455:5218:04
5:49
+0:01
20K
12.43 mi11:13:071:12:575:5218:12
5:51
+0:02
Half
13.11 mi11:17:051:16:555:523:58
5:49
-0:02
25K
15.53 mi11:31:121:31:025:5214:07
5:49
0:00
30K
18.64 mi11:49:361:49:265:5218:24
5:55
+0:06
20M
20.00 mi11:57:311:57:215:527:55
5:50
-0:05
21M
21.00 mi12:03:412:03:315:536:10
6:10
+0:20
35K
21.75 mi12:07:522:07:425:524:11
5:36
-0:34
23M
23.00 mi12:15:132:15:035:527:21
5:52
+0:16
24M
24.00 mi12:20:582:20:485:525:45
5:45
-0:07
40K
24.85 mi12:25:542:25:445:524:56
5:46
+0:01
25.2M
25.20 mi12:28:002:27:505:522:06
6:05
+0:19
Finish
26.22 mi12:33:362:33:265:515:36
5:30
-0:35

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

5:30 /mi

Average Pace

5:51 /mi

Slowest Pace

6:10 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:25:10

95% of race

Time at Steady Pace

8:16

5% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 5:51 /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 mi10:18:4918:396:0018:39
6:00
#690
10K
6.21 mi10:36:5136:415:5418:02
5:48
#561
15K
9.32 mi10:54:5554:455:5218:04
5:49
#493
20K
12.43 mi11:13:071:12:575:5218:12
5:51
#441
Half
13.11 mi11:17:051:16:555:523:58
5:49
#440
25K
15.53 mi11:31:121:31:025:5214:07
5:49
#417
30K
18.64 mi11:49:361:49:265:5218:24
5:55
#379
20M
20.00 mi11:57:311:57:215:527:55
5:50
#364
21M
21.00 mi12:03:412:03:315:536:10
6:10
#344
35K
21.75 mi12:07:522:07:425:524:11
5:36
#333
23M
23.00 mi12:15:132:15:035:527:21
5:52
#314
24M
24.00 mi12:20:582:20:485:525:45
5:45
#306
40K
24.85 mi12:25:542:25:445:524:56
5:46
#282
25.2M
25.20 mi12:28:002:27:505:522:06
6:05
#278
Finish
26.22 mi12:33:362:33:265:515:36
5:30
#254
Faster pace
Steady pace
Slower pace
Est.Checkpoint not recorded (estimated)
~Segment time uses estimated prior

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi690645645380(Top 1%)346(Top 2%)346(Top 7%)
10K6.21 mi3.10 mi561+129519+126519+126431(Top 2%)396(Top 3%)396(Top 7%)
15K9.32 mi3.11 mi493+68453+66453+66380(Top 1%)346(Top 2%)346(Top 7%)
20K12.43 mi3.11 mi441+52405+48405+48364(Top 1%)331(Top 2%)331(Top 6%)
Half13.11 mi0.68 mi440+1404+1404+1425(Top 2%)393(Top 3%)393(Top 7%)
25K15.53 mi2.42 mi417+23382+22382+22301(Top 1%)273(Top 2%)273(Top 5%)
30K18.64 mi3.11 mi379+38347+35347+35285(Top 1%)261(Top 2%)261(Top 5%)
20M20.00 mi1.36 mi364+15332+15332+15179(Top 0.7%)157(Top 1%)157(Top 3%)
21M21.00 mi1.00 mi344+20312+20312+20208(Top 0.8%)185(Top 1%)185(Top 4%)
35K21.75 mi0.75 mi333+11302+10302+10149(Top 0.6%)127(Top 0.8%)127(Top 2%)
23M23.00 mi1.25 mi314+19283+19283+19185(Top 0.7%)162(Top 1%)162(Top 3%)
24M24.00 mi1.00 mi306+8276+7276+7202(Top 0.8%)179(Top 1%)179(Top 3%)
40K24.85 mi0.85 mi282+24254+22254+22124(Top 0.5%)110(Top 0.7%)110(Top 2%)
25.2M25.20 mi0.35 mi278+4250+4250+4106(Top 0.4%)92(Top 0.6%)92(Top 2%)
Finish26.22 mi1.02 mi254+24228+22228+2295(Top 0.4%)84(Top 0.6%)84(Top 2%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 1%
×21stories
+97ft-345ft

Overall

380

Males

346

M18-39

346

5K→10K

3.1 - 6.2 mi

Top 2%
×5stories
+79ft-138ft

Overall

431

Males

396

M18-39

396

10K→15K

6.2 - 9.3 mi

Top 1%
×3stories
+67ft-78ft

Overall

380

Males

346

M18-39

346

15K→20K

9.3 - 12.4 mi

Top 1%
×5stories
+106ft-86ft

Overall

364

Males

331

M18-39

331

20K→Half

12.4 - 13.1 mi

Top 2%
×2stories
+19ft-37ft

Overall

425

Males

393

M18-39

393

Half→25K

13.1 - 15.5 mi

Top 1%
×4stories
+66ft-88ft

Overall

301

Males

273

M18-39

273

25K→30K

15.5 - 18.6 mi

Top 1%
×9stories
+181ft-148ft

Overall

285

Males

261

M18-39

261

30K→20M

18.6 - 20.0 mi

Top 0.7%
×5stories
+64ft-50ft

Overall

179

Males

157

M18-39

157

20M→21M

20.0 - 21.0 mi

Top 0.8%
×8stories
+106ft-24ft

Overall

208

Males

185

M18-39

185

21M→35K

21.0 - 21.8 mi

Top 0.6%
×7stories
+17ft-86ft

Overall

149

Males

127

M18-39

127

35K→23M

21.8 - 23.0 mi

Top 0.7%
×5stories
+23ft-63ft

Overall

185

Males

162

M18-39

162

23M→24M

23.0 - 24.0 mi

Top 0.8%
×6stories
+12ft-82ft

Overall

202

Males

179

M18-39

179

24M→40K

24.0 - 24.9 mi

Top 0.5%
×1story
+6ft-20ft

Overall

124

Males

110

M18-39

110

40K→25.2M

24.9 - 25.2 mi

Top 0.4%
×1story
+13ft-16ft

Overall

106

Males

92

M18-39

92

25.2M→Finish

25.2 - 26.2 mi

Top 0.4%
×2stories
+22ft-21ft

Overall

95

Males

84

M18-39

84

Passing Analysis

Category:
Athletes Passed
457
Passed By
21
Net Change
+436
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#690
5K → 10K1323+129#690#561
10K → 15K691+68#561#493
15K → 20K553+52#493#441
20K → Half32+1#441#440
Half → 25K241+23#440#417
25K → 30K413+38#417#379
30K → 20M161+15#379#364
20M → 21M200+20#364#344
21M → 35K110+11#344#333
35K → 23M212+19#333#314
23M → 24M124+8#314#306
24M → 40K240+24#306#282
40K → 25.2M40+4#282#278
25.2M → Finish251+24#278#254
TOTALS45721+436
📊

Passing Visuals

Category:

📈Position Graph

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🎨Heatmap Timeline

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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