Boston Marathon logo
BOSTON MARATHON 2023

Jacob Smith

Bib: 5439•M

NY

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 26622
Top 24%
Gender (Male)
#0 / 15176
Top 37%
Division (M18-39)
#0 / 5285
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
22:33
Rank: #7832
Start → 5K
22:33 | 7:15/mi
10K· 6.21 mi
45:17
Rank: #8355 (-523)
5K → 10K
22:44 | 7:19/mi
15K· 9.32 mi
1:08:14
Rank: #8609 (-254)
10K → 15K
22:57 | 7:23/mi
20K· 12.43 mi
1:31:02
Rank: #8424 (+185)
15K → 20K
22:48 | 7:20/mi
Half· 13.11 mi
1:36:01
Rank: #8438 (-14)
20K → Half
4:59 | 7:18/mi
25K· 15.53 mi
1:53:51
Rank: #8288 (+150)
Half → 25K
17:50 | 7:21/mi
30K· 18.64 mi
2:17:01
Rank: #8018 (+270)
25K → 30K
23:10 | 7:27/mi
20M
2:26:57
Rank: #7787 (+231)
30K → 20M
9:56 | 7:19/mi
21M
2:34:29
Rank: #7567 (+220)
20M → 21M
7:32 | 7:32/mi
35K· 21.75 mi
2:39:39
Rank: #7447 (+120)
21M → 35K
5:10 | 6:54/mi
23M
2:48:50
Rank: #7287 (+160)
35K → 23M
9:11 | 7:20/mi
24M
2:55:54
Rank: #7147 (+140)
23M → 24M
7:04 | 7:04/mi
40K· 24.85 mi
3:01:41
Rank: #6915 (+232)
24M → 40K
5:47 | 6:46/mi
25.2M
3:03:54
Rank: #6742 (+173)
40K → 25.2M
2:13 | 6:26/mi
Finish· 26.22 mi
3:09:41
Rank: #6347 (+395)
25.2M → Finish
5:47 | 5:41/mi

The Course

Is this your race?

Claim it — unlock a deeper AI report on this race, free

A personalized Race Performance Report that goes beyond this page — emailed to you, built from your real splits.

Half Splits

1st Half· via Half
Distance13.11 mi
Time1:36:01
Pace7:19 /mi
2nd Half✓ Faster
Distance13.11 mi
Time1:33:40
Pace7:09 /mi
📊Negative Split: 2.4% faster second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:27:4422:337:1522:33
7:15
-
10K
6.21 mi10:50:2845:177:1722:44
7:19
+0:04
15K
9.32 mi11:13:251:08:147:1922:57
7:23
+0:04
20K
12.43 mi11:36:131:31:027:2022:48
7:20
-0:03
Half
13.11 mi11:41:121:36:017:194:59
7:18
-0:02
25K
15.53 mi11:59:021:53:517:2017:50
7:21
+0:03
30K
18.64 mi12:22:122:17:017:2123:10
7:27
+0:06
20M
20.00 mi12:32:082:26:577:219:56
7:19
-0:08
21M
21.00 mi12:39:402:34:297:217:32
7:32
+0:13
35K
21.75 mi12:44:502:39:397:205:10
6:54
-0:38
23M
23.00 mi12:54:012:48:507:209:11
7:20
+0:26
24M
24.00 mi13:01:052:55:547:207:04
7:04
-0:16
40K
24.85 mi13:06:523:01:417:195:47
6:46
-0:18
25.2M
25.20 mi13:09:053:03:547:182:13
6:26
-0:20
Finish
26.22 mi13:14:523:09:417:145:47
5:41
-0:45

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

5:41 /mi

Average Pace

7:14 /mi

Slowest Pace

7:32 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

26:01

14% of race

Time at Steady Pace

2:43:40

86% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:14 /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 mi10:27:4422:337:1522:33
7:15
#7832
10K
6.21 mi10:50:2845:177:1722:44
7:19
#8355
15K
9.32 mi11:13:251:08:147:1922:57
7:23
#8609
20K
12.43 mi11:36:131:31:027:2022:48
7:20
#8424
Half
13.11 mi11:41:121:36:017:194:59
7:18
#8438
25K
15.53 mi11:59:021:53:517:2017:50
7:21
#8288
30K
18.64 mi12:22:122:17:017:2123:10
7:27
#8018
20M
20.00 mi12:32:082:26:577:219:56
7:19
#7787
21M
21.00 mi12:39:402:34:297:217:32
7:32
#7567
35K
21.75 mi12:44:502:39:397:205:10
6:54
#7447
23M
23.00 mi12:54:012:48:507:209:11
7:20
#7287
24M
24.00 mi13:01:052:55:547:207:04
7:04
#7147
40K
24.85 mi13:06:523:01:417:195:47
6:46
#6915
25.2M
25.20 mi13:09:053:03:547:182:13
6:26
#6742
Finish
26.22 mi13:14:523:09:417:145:47
5:41
#6347
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi7832685868589205(Top 35%)7666(Top 51%)7666(Top 145%)
10K6.21 mi3.10 mi8355-5237183-3257183-3258949(Top 34%)7544(Top 50%)7544(Top 143%)
15K9.32 mi3.11 mi8609-2547332-1497332-1499205(Top 35%)7666(Top 51%)7666(Top 145%)
20K12.43 mi3.11 mi8424+1857204+1287204+1288058(Top 30%)6922(Top 46%)6922(Top 131%)
Half13.11 mi0.68 mi8438-147209-57209-58552(Top 32%)7216(Top 48%)7216(Top 137%)
25K15.53 mi2.42 mi8288+1507092+1177092+1177635(Top 29%)6559(Top 43%)6559(Top 124%)
30K18.64 mi3.11 mi8018+2706887+2056887+2056923(Top 26%)6007(Top 40%)6007(Top 114%)
20M20.00 mi1.36 mi7787+2316724+1636724+1635696(Top 21%)5071(Top 33%)5071(Top 96%)
21M21.00 mi1.00 mi7567+2206560+1646560+1644763(Top 18%)4304(Top 28%)4304(Top 81%)
35K21.75 mi0.75 mi7447+1206465+956465+954830(Top 18%)4366(Top 29%)4366(Top 83%)
23M23.00 mi1.25 mi7287+1606344+1216344+1215496(Top 21%)4833(Top 32%)4833(Top 91%)
24M24.00 mi1.00 mi7147+1406234+1106234+1105025(Top 19%)4443(Top 29%)4443(Top 84%)
40K24.85 mi0.85 mi6915+2326058+1766058+1762687(Top 10%)2486(Top 16%)2486(Top 47%)
25.2M25.20 mi0.35 mi6742+1735928+1305928+130425(Top 2%)403(Top 3%)403(Top 8%)
Finish26.22 mi1.02 mi6347+3955649+2795649+279216(Top 0.8%)199(Top 1%)199(Top 4%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 35%
×21stories
+97ft-345ft

Overall

9205

Males

7666

M18-39

7666

5K→10K

3.1 - 6.2 mi

Top 34%
×5stories
+79ft-138ft

Overall

8949

Males

7544

M18-39

7544

10K→15K

6.2 - 9.3 mi

Top 35%
×3stories
+67ft-78ft

Overall

9205

Males

7666

M18-39

7666

15K→20K

9.3 - 12.4 mi

Top 30%
×5stories
+106ft-86ft

Overall

8058

Males

6922

M18-39

6922

20K→Half

12.4 - 13.1 mi

Top 32%
×2stories
+19ft-37ft

Overall

8552

Males

7216

M18-39

7216

Half→25K

13.1 - 15.5 mi

Top 29%
×4stories
+66ft-88ft

Overall

7635

Males

6559

M18-39

6559

25K→30K

15.5 - 18.6 mi

Top 26%
×9stories
+181ft-148ft

Overall

6923

Males

6007

M18-39

6007

30K→20M

18.6 - 20.0 mi

Top 21%
×5stories
+64ft-50ft

Overall

5696

Males

5071

M18-39

5071

20M→21M

20.0 - 21.0 mi

Top 18%
×8stories
+106ft-24ft

Overall

4763

Males

4304

M18-39

4304

21M→35K

21.0 - 21.8 mi

Top 18%
×7stories
+17ft-86ft

Overall

4830

Males

4366

M18-39

4366

35K→23M

21.8 - 23.0 mi

Top 21%
×5stories
+23ft-63ft

Overall

5496

Males

4833

M18-39

4833

23M→24M

23.0 - 24.0 mi

Top 19%
×6stories
+12ft-82ft

Overall

5025

Males

4443

M18-39

4443

24M→40K

24.0 - 24.9 mi

Top 10%
×1story
+6ft-20ft

Overall

2687

Males

2486

M18-39

2486

40K→25.2M

24.9 - 25.2 mi

Top 2%
×1story
+13ft-16ft

Overall

425

Males

403

M18-39

403

25.2M→Finish

25.2 - 26.2 mi

Top 0.8%
×2stories
+22ft-21ft

Overall

216

Males

199

M18-39

199

Passing Analysis

Category:
Athletes Passed
2541
Passed By
1056
Net Change
+1485
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#7832
5K → 10K51574-523#7832#8355
10K → 15K69323-254#8355#8609
15K → 20K23651+185#8609#8424
20K → Half1832-14#8424#8438
Half → 25K18131+150#8438#8288
25K → 30K29525+270#8288#8018
30K → 20M2354+231#8018#7787
20M → 21M2211+220#7787#7567
21M → 35K1233+120#7567#7447
35K → 23M1688+160#7447#7287
23M → 24M1444+140#7287#7147
24M → 40K2320+232#7147#6915
40K → 25.2M1730+173#6915#6742
25.2M → Finish3950+395#6742#6347
TOTALS25411056+1485
📊

Passing Visuals

Category:
Loading...

🔥Passing Intensity

Loading...

🔄Passing Circle

Loading...

🌊Position Flow

Loading...

🏃Race Lanes

Loading...

Upload your GPX file

Supports Garmin, Apple Watch, Polar, Suunto, COROS, Strava, and other apps

.gpx files up to 10MB

Export Track Data

Download your race performance as a GPX or TCX file to import into Strava, Garmin Connect, or other fitness apps.

Questions or issues regarding timing data?

If you notice any discrepancies in your timing data or have questions about your results, our support team can help.

Contact Race Support
Share Feedback

Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing