Boston Marathon logo
BOSTON MARATHON 2023

Brandon Smith

Bib: 3548•M

AR

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 26622
Top 28%
Gender (Male)
#0 / 15176
Top 41%
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
21:43
Rank: #6210
Start → 5K
21:43 | 6:59/mi
10K· 6.21 mi
44:15
Rank: #7256 (-1046)
5K → 10K
22:32 | 7:15/mi
15K· 9.32 mi
1:06:04
Rank: #7032 (+224)
10K → 15K
21:49 | 7:01/mi
20K· 12.43 mi
1:31:10
Rank: #8525 (-1493)
15K → 20K
25:06 | 8:05/mi
Half· 13.11 mi
1:36:07
Rank: #8506 (+19)
20K → Half
4:57 | 7:15/mi
25K· 15.53 mi
1:54:04
Rank: #8397 (+109)
Half → 25K
17:57 | 7:24/mi
30K· 18.64 mi
2:17:27
Rank: #8186 (+211)
25K → 30K
23:23 | 7:32/mi
20M
2:27:45
Rank: #8079 (+107)
30K → 20M
10:18 | 7:35/mi
21M
2:35:40
Rank: #7973 (+106)
20M → 21M
7:55 | 7:55/mi
35K· 21.75 mi
2:41:07
Rank: #7923 (+50)
21M → 35K
5:27 | 7:17/mi
23M
2:50:26
Rank: #7766 (+157)
35K → 23M
9:19 | 7:26/mi
24M
2:57:40
Rank: #7639 (+127)
23M → 24M
7:14 | 7:14/mi
40K· 24.85 mi
3:04:00
Rank: #7562 (+77)
24M → 40K
6:20 | 7:24/mi
25.2M
3:06:39
Rank: #7515 (+47)
40K → 25.2M
2:39 | 7:41/mi
Finish· 26.22 mi
3:13:36
Rank: #7324 (+191)
25.2M → Finish
6:57 | 6:49/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
Time1:36:07
Pace7:20 /mi
2nd Half
Distance13.11 mi
Time1:37:29
Pace7:26 /mi
📊Positive Split: 1.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:23:2121:436:5921:43
6:59
-
10K
6.21 mi10:45:5344:157:0722:32
7:15
+0:16
15K
9.32 mi11:07:421:06:047:0521:49
7:01
-0:14
20K
12.43 mi11:32:481:31:107:2025:06
8:05
+1:04
Half
13.11 mi11:37:451:36:077:204:57
7:15
-0:50
25K
15.53 mi11:55:421:54:047:2117:57
7:24
+0:09
30K
18.64 mi12:19:052:17:277:2223:23
7:32
+0:08
20M
20.00 mi12:29:232:27:457:2310:18
7:35
+0:03
21M
21.00 mi12:37:182:35:407:257:55
7:55
+0:20
35K
21.75 mi12:42:452:41:077:255:27
7:17
-0:38
23M
23.00 mi12:52:042:50:267:259:19
7:26
+0:09
24M
24.00 mi12:59:182:57:407:247:14
7:14
-0:12
40K
24.85 mi13:05:383:04:007:246:20
7:24
+0:10
25.2M
25.20 mi13:08:173:06:397:242:39
7:41
+0:17
Finish
26.22 mi13:15:143:13:367:236:57
6:49
-0:52

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

6:49 /mi

Average Pace

7:23 /mi

Slowest Pace

8:05 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:04:15

64% of race

Time at Steady Pace

44:15

23% of race

Time at Slower Pace

25:06

13% of race

Average Pace: 7:23 /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 mi10:23:2121:436:5921:43
6:59
#6210
10K
6.21 mi10:45:5344:157:0722:32
7:15
#7256
15K
9.32 mi11:07:421:06:047:0521:49
7:01
#7032
20K
12.43 mi11:32:481:31:107:2025:06
8:05
#8525
Half
13.11 mi11:37:451:36:077:204:57
7:15
#8506
25K
15.53 mi11:55:421:54:047:2117:57
7:24
#8397
30K
18.64 mi12:19:052:17:277:2223:23
7:32
#8186
20M
20.00 mi12:29:232:27:457:2310:18
7:35
#8079
21M
21.00 mi12:37:182:35:407:257:55
7:55
#7973
35K
21.75 mi12:42:452:41:077:255:27
7:17
#7923
23M
23.00 mi12:52:042:50:267:259:19
7:26
#7766
24M
24.00 mi12:59:182:57:407:247:14
7:14
#7639
40K
24.85 mi13:05:383:04:007:246:20
7:24
#7562
25.2M
25.20 mi13:08:173:06:397:242:39
7:41
#7515
Finish
26.22 mi13:15:143:13:367:236:57
6:49
#7324
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi6210566456646723(Top 25%)6026(Top 40%)6026(Top 114%)
10K6.21 mi3.10 mi7256-10466444-7806444-7808528(Top 32%)7274(Top 48%)7274(Top 138%)
15K9.32 mi3.11 mi7032+2246276+1686276+1686723(Top 25%)6026(Top 40%)6026(Top 114%)
20K12.43 mi3.11 mi8525-14937264-9887264-98814107(Top 53%)9921(Top 65%)9921(Top 188%)
Half13.11 mi0.68 mi8506+197257+77257+78346(Top 31%)7087(Top 47%)7087(Top 134%)
25K15.53 mi2.42 mi8397+1097166+917166+918070(Top 30%)6842(Top 45%)6842(Top 129%)
30K18.64 mi3.11 mi8186+2116989+1776989+1777420(Top 28%)6332(Top 42%)6332(Top 120%)
20M20.00 mi1.36 mi8079+1076906+836906+837396(Top 28%)6202(Top 41%)6202(Top 117%)
21M21.00 mi1.00 mi7973+1066824+826824+826878(Top 26%)5777(Top 38%)5777(Top 109%)
35K21.75 mi0.75 mi7923+506781+436781+437101(Top 27%)5942(Top 39%)5942(Top 112%)
23M23.00 mi1.25 mi7766+1576660+1216660+1216140(Top 23%)5269(Top 35%)5269(Top 100%)
24M24.00 mi1.00 mi7639+1276560+1006560+1005990(Top 23%)5089(Top 34%)5089(Top 96%)
40K24.85 mi0.85 mi7562+776486+746486+746188(Top 23%)5126(Top 34%)5126(Top 97%)
25.2M25.20 mi0.35 mi7515+476445+416445+414914(Top 18%)4192(Top 28%)4192(Top 79%)
Finish26.22 mi1.02 mi7324+1916296+1496296+1494238(Top 16%)3714(Top 24%)3714(Top 70%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 25%
×21stories
+97ft-345ft

Overall

6723

Males

6026

M18-39

6026

5K→10K

3.1 - 6.2 mi

Top 32%
×5stories
+79ft-138ft

Overall

8528

Males

7274

M18-39

7274

10K→15K

6.2 - 9.3 mi

Top 25%
×3stories
+67ft-78ft

Overall

6723

Males

6026

M18-39

6026

15K→20K

9.3 - 12.4 mi

Top 53%
×5stories
+106ft-86ft

Overall

14107

Males

9921

M18-39

9921

20K→Half

12.4 - 13.1 mi

Top 31%
×2stories
+19ft-37ft

Overall

8346

Males

7087

M18-39

7087

Half→25K

13.1 - 15.5 mi

Top 30%
×4stories
+66ft-88ft

Overall

8070

Males

6842

M18-39

6842

25K→30K

15.5 - 18.6 mi

Top 28%
×9stories
+181ft-148ft

Overall

7420

Males

6332

M18-39

6332

30K→20M

18.6 - 20.0 mi

Top 28%
×5stories
+64ft-50ft

Overall

7396

Males

6202

M18-39

6202

20M→21M

20.0 - 21.0 mi

Top 26%
×8stories
+106ft-24ft

Overall

6878

Males

5777

M18-39

5777

21M→35K

21.0 - 21.8 mi

Top 27%
×7stories
+17ft-86ft

Overall

7101

Males

5942

M18-39

5942

35K→23M

21.8 - 23.0 mi

Top 23%
×5stories
+23ft-63ft

Overall

6140

Males

5269

M18-39

5269

23M→24M

23.0 - 24.0 mi

Top 23%
×6stories
+12ft-82ft

Overall

5990

Males

5089

M18-39

5089

24M→40K

24.0 - 24.9 mi

Top 23%
×1story
+6ft-20ft

Overall

6188

Males

5126

M18-39

5126

40K→25.2M

24.9 - 25.2 mi

Top 18%
×1story
+13ft-16ft

Overall

4914

Males

4192

M18-39

4192

25.2M→Finish

25.2 - 26.2 mi

Top 16%
×2stories
+22ft-21ft

Overall

4238

Males

3714

M18-39

3714

Passing Analysis

Category:
Athletes Passed
1717
Passed By
2831
Net Change
-1114
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#6210
5K → 10K61052-1046#6210#7256
10K → 15K27955+224#7256#7032
15K → 20K31496-1493#7032#8525
20K → Half4122+19#8525#8506
Half → 25K15142+109#8506#8397
25K → 30K24635+211#8397#8186
30K → 20M13932+107#8186#8079
20M → 21M12923+106#8079#7973
21M → 35K7121+50#7973#7923
35K → 23M17215+157#7923#7766
23M → 24M1369+127#7766#7639
24M → 40K9417+77#7639#7562
40K → 25.2M525+47#7562#7515
25.2M → Finish1987+191#7515#7324
TOTALS17172831-1114
📊

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