Boston Marathon logo
BOSTON MARATHON 2023

Mark Smith

Bib: 5678•M

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 26622
Top 13%
Gender (Male)
#0 / 15176
Top 22%
Division (M18-39)
#0 / 5285
Top 46%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
21:17
Rank: #5136
Start → 5K
21:17 | 6:51/mi
10K· 6.21 mi
42:09
Rank: #4821 (+315)
5K → 10K
20:52 | 6:43/mi
15K· 9.32 mi
1:03:07
Rank: #4717 (+104)
10K → 15K
20:58 | 6:45/mi
20K· 12.43 mi
1:23:58
Rank: #4408 (+309)
15K → 20K
20:51 | 6:43/mi
Half· 13.11 mi
1:28:26
Rank: #4325 (+83)
20K → Half
4:28 | 6:33/mi
25K· 15.53 mi
1:44:44
Rank: #4146 (+179)
Half → 25K
16:18 | 6:43/mi
30K· 18.64 mi
2:06:00
Rank: #3945 (+201)
25K → 30K
21:16 | 6:51/mi
20M
2:15:16
Rank: #3803 (+142)
30K → 20M
9:16 | 6:49/mi
21M
2:22:28
Rank: #3732 (+71)
20M → 21M
7:12 | 7:12/mi
35K· 21.75 mi
2:27:25
Rank: #3685 (+47)
21M → 35K
4:57 | 6:37/mi
23M
2:36:04
Rank: #3606 (+79)
35K → 23M
8:39 | 6:55/mi
24M
2:42:52
Rank: #3603 (+3)
23M → 24M
6:48 | 6:48/mi
40K· 24.85 mi
2:48:48
Rank: #3577 (+26)
24M → 40K
5:56 | 6:56/mi
25.2M
2:51:25
Rank: #3586 (-9)
40K → 25.2M
2:37 | 7:35/mi
Finish· 26.22 mi
2:58:18
Rank: #3583 (+3)
25.2M → Finish
6:53 | 6:45/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 HalfFaster
Distance13.11 mi
Time1:28:26
Pace6:45 /mi
2nd Half
Distance13.11 mi
Time1:29:52
Pace6:51 /mi
📊Positive Split: 1.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:23:4721:176:5121:17
6:51
-
10K
6.21 mi10:44:3942:096:4720:52
6:43
-0:08
15K
9.32 mi11:05:371:03:076:4620:58
6:45
+0:02
20K
12.43 mi11:26:281:23:586:4520:51
6:43
-0:02
Half
13.11 mi11:30:561:28:266:454:28
6:33
-0:10
25K
15.53 mi11:47:141:44:446:4516:18
6:43
+0:10
30K
18.64 mi12:08:302:06:006:4621:16
6:51
+0:08
20M
20.00 mi12:17:462:15:166:469:16
6:49
-0:02
21M
21.00 mi12:24:582:22:286:477:12
7:12
+0:23
35K
21.75 mi12:29:552:27:256:474:57
6:37
-0:35
23M
23.00 mi12:38:342:36:046:478:39
6:55
+0:18
24M
24.00 mi12:45:222:42:526:476:48
6:48
-0:07
40K
24.85 mi12:51:182:48:486:475:56
6:56
+0:08
25.2M
25.20 mi12:53:552:51:256:482:37
7:35
+0:39
Finish
26.22 mi13:00:482:58:186:486:53
6:45
-0:50

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

6:33 /mi

Average Pace

6:48 /mi

Slowest Pace

7:35 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:55:41

99% of race

Time at Steady Pace

2:37

1% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 6:48 /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 mi10:23:4721:176:5121:17
6:51
#5136
10K
6.21 mi10:44:3942:096:4720:52
6:43
#4821
15K
9.32 mi11:05:371:03:076:4620:58
6:45
#4717
20K
12.43 mi11:26:281:23:586:4520:51
6:43
#4408
Half
13.11 mi11:30:561:28:266:454:28
6:33
#4325
25K
15.53 mi11:47:141:44:446:4516:18
6:43
#4146
30K
18.64 mi12:08:302:06:006:4621:16
6:51
#3945
20M
20.00 mi12:17:462:15:166:469:16
6:49
#3803
21M
21.00 mi12:24:582:22:286:477:12
7:12
#3732
35K
21.75 mi12:29:552:27:256:474:57
6:37
#3685
23M
23.00 mi12:38:342:36:046:478:39
6:55
#3606
24M
24.00 mi12:45:222:42:526:476:48
6:48
#3603
40K
24.85 mi12:51:182:48:486:475:56
6:56
#3577
25.2M
25.20 mi12:53:552:51:256:482:37
7:35
#3586
Finish
26.22 mi13:00:482:58:186:486:53
6:45
#3583
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi5136476147614573(Top 17%)4269(Top 28%)4269(Top 81%)
10K6.21 mi3.10 mi4821+3154483+2784483+2784490(Top 17%)4195(Top 28%)4195(Top 79%)
15K9.32 mi3.11 mi4717+1044392+914392+914573(Top 17%)4269(Top 28%)4269(Top 81%)
20K12.43 mi3.11 mi4408+3094123+2694123+2693657(Top 14%)3461(Top 23%)3461(Top 65%)
Half13.11 mi0.68 mi4325+834049+744049+743097(Top 12%)2962(Top 20%)2962(Top 56%)
25K15.53 mi2.42 mi4146+1793887+1623887+1623546(Top 13%)3351(Top 22%)3351(Top 63%)
30K18.64 mi3.11 mi3945+2013716+1713716+1713294(Top 12%)3104(Top 20%)3104(Top 59%)
20M20.00 mi1.36 mi3803+1423586+1303586+1302949(Top 11%)2774(Top 18%)2774(Top 52%)
21M21.00 mi1.00 mi3732+713521+653521+653100(Top 12%)2904(Top 19%)2904(Top 55%)
35K21.75 mi0.75 mi3685+473477+443477+443105(Top 12%)2907(Top 19%)2907(Top 55%)
23M23.00 mi1.25 mi3606+793405+723405+723283(Top 12%)3052(Top 20%)3052(Top 58%)
24M24.00 mi1.00 mi3603+33399+63399+63636(Top 14%)3335(Top 22%)3335(Top 63%)
40K24.85 mi0.85 mi3577+263375+243375+243526(Top 13%)3205(Top 21%)3205(Top 61%)
25.2M25.20 mi0.35 mi3586-93379-43379-44265(Top 16%)3735(Top 25%)3735(Top 71%)
Finish26.22 mi1.02 mi3583+33371+83371+83798(Top 14%)3370(Top 22%)3370(Top 64%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 17%
×21stories
+97ft-345ft

Overall

4573

Males

4269

M18-39

4269

5K→10K

3.1 - 6.2 mi

Top 17%
×5stories
+79ft-138ft

Overall

4490

Males

4195

M18-39

4195

10K→15K

6.2 - 9.3 mi

Top 17%
×3stories
+67ft-78ft

Overall

4573

Males

4269

M18-39

4269

15K→20K

9.3 - 12.4 mi

Top 14%
×5stories
+106ft-86ft

Overall

3657

Males

3461

M18-39

3461

20K→Half

12.4 - 13.1 mi

Top 12%
×2stories
+19ft-37ft

Overall

3097

Males

2962

M18-39

2962

Half→25K

13.1 - 15.5 mi

Top 13%
×4stories
+66ft-88ft

Overall

3546

Males

3351

M18-39

3351

25K→30K

15.5 - 18.6 mi

Top 12%
×9stories
+181ft-148ft

Overall

3294

Males

3104

M18-39

3104

30K→20M

18.6 - 20.0 mi

Top 11%
×5stories
+64ft-50ft

Overall

2949

Males

2774

M18-39

2774

20M→21M

20.0 - 21.0 mi

Top 12%
×8stories
+106ft-24ft

Overall

3100

Males

2904

M18-39

2904

21M→35K

21.0 - 21.8 mi

Top 12%
×7stories
+17ft-86ft

Overall

3105

Males

2907

M18-39

2907

35K→23M

21.8 - 23.0 mi

Top 12%
×5stories
+23ft-63ft

Overall

3283

Males

3052

M18-39

3052

23M→24M

23.0 - 24.0 mi

Top 14%
×6stories
+12ft-82ft

Overall

3636

Males

3335

M18-39

3335

24M→40K

24.0 - 24.9 mi

Top 13%
×1story
+6ft-20ft

Overall

3526

Males

3205

M18-39

3205

40K→25.2M

24.9 - 25.2 mi

Top 16%
×1story
+13ft-16ft

Overall

4265

Males

3735

M18-39

3735

25.2M→Finish

25.2 - 26.2 mi

Top 14%
×2stories
+22ft-21ft

Overall

3798

Males

3370

M18-39

3370

Passing Analysis

Category:
Athletes Passed
1962
Passed By
409
Net Change
+1553
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#5136
5K → 10K39984+315#5136#4821
10K → 15K17167+104#4821#4717
15K → 20K32011+309#4717#4408
20K → Half841+83#4408#4325
Half → 25K19112+179#4325#4146
25K → 30K22423+201#4146#3945
30K → 20M15210+142#3945#3803
20M → 21M9524+71#3803#3732
21M → 35K503+47#3732#3685
35K → 23M10728+79#3685#3606
23M → 24M4542+3#3606#3603
24M → 40K5832+26#3603#3577
40K → 25.2M1322-9#3577#3586
25.2M → Finish5350+3#3586#3583
TOTALS1962409+1553
📊

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