Boston Marathon logo
BOSTON MARATHON 2023

Jeffrey Smart

Bib: 9416•M

ON

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 26622
Top 21%
Gender (Male)
#0 / 15176
Top 33%
Masters (Masters Men)
#0 / 9891
Top 19%
Division (M50-54)
#0 / 2052
Top 13%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
22:18
Rank: #7355
Start → 5K
22:18 | 7:11/mi
10K· 6.21 mi
43:52
Rank: #6848 (+507)
5K → 10K
21:34 | 6:56/mi
15K· 9.32 mi
1:05:25
Rank: #6608 (+240)
10K → 15K
21:33 | 6:56/mi
20K· 12.43 mi
1:27:14
Rank: #6457 (+151)
15K → 20K
21:49 | 7:01/mi
Half· 13.11 mi
1:31:56
Rank: #6429 (+28)
20K → Half
4:42 | 6:53/mi
25K· 15.53 mi
1:48:54
Rank: #6278 (+151)
Half → 25K
16:58 | 7:00/mi
30K· 18.64 mi
2:11:39
Rank: #6196 (+82)
25K → 30K
22:45 | 7:19/mi
20M
2:21:17
Rank: #6025 (+171)
30K → 20M
9:38 | 7:05/mi
21M
2:28:49
Rank: #5911 (+114)
20M → 21M
7:32 | 7:32/mi
35K· 21.75 mi
2:33:54
Rank: #5830 (+81)
21M → 35K
5:05 | 6:48/mi
23M
2:42:44
Rank: #5663 (+167)
35K → 23M
8:50 | 7:03/mi
24M
2:49:59
Rank: #5622 (+41)
23M → 24M
7:15 | 7:15/mi
40K· 24.85 mi
2:56:17
Rank: #5599 (+23)
24M → 40K
6:18 | 7:22/mi
25.2M
2:58:59
Rank: #5575 (+24)
40K → 25.2M
2:42 | 7:50/mi
Finish· 26.22 mi
3:06:33
Rank: #5599 (-24)
25.2M → Finish
7:34 | 7:26/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
Time1:31:56
Pace7:01 /mi
2nd Half
Distance13.11 mi
Time1:34:37
Pace7:13 /mi
📊Positive Split: 2.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:48:1422:187:1122:18
7:11
-
10K
6.21 mi11:09:4843:527:0421:34
6:56
-0:15
15K
9.32 mi11:31:211:05:257:0121:33
6:56
0:00
20K
12.43 mi11:53:101:27:147:0121:49
7:01
+0:05
Half
13.11 mi11:57:521:31:567:014:42
6:53
-0:08
25K
15.53 mi12:14:501:48:547:0116:58
7:00
+0:07
30K
18.64 mi12:37:352:11:397:0422:45
7:19
+0:19
20M
20.00 mi12:47:132:21:177:049:38
7:05
-0:14
21M
21.00 mi12:54:452:28:497:057:32
7:32
+0:27
35K
21.75 mi12:59:502:33:547:055:05
6:48
-0:44
23M
23.00 mi13:08:402:42:447:058:50
7:03
+0:15
24M
24.00 mi13:15:552:49:597:057:15
7:15
+0:12
40K
24.85 mi13:22:132:56:177:066:18
7:22
+0:07
25.2M
25.20 mi13:24:552:58:597:062:42
7:50
+0:28
Finish
26.22 mi13:32:293:06:337:077:34
7:26
-0:24

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

6:48 /mi

Average Pace

7:07 /mi

Slowest Pace

7:50 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:56:19

95% of race

Time at Steady Pace

10:14

5% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:07 /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 mi10:48:1422:187:1122:18
7:11
#7355
10K
6.21 mi11:09:4843:527:0421:34
6:56
#6848
15K
9.32 mi11:31:211:05:257:0121:33
6:56
#6608
20K
12.43 mi11:53:101:27:147:0121:49
7:01
#6457
Half
13.11 mi11:57:521:31:567:014:42
6:53
#6429
25K
15.53 mi12:14:501:48:547:0116:58
7:00
#6278
30K
18.64 mi12:37:352:11:397:0422:45
7:19
#6196
20M
20.00 mi12:47:132:21:177:049:38
7:05
#6025
21M
21.00 mi12:54:452:28:497:057:32
7:32
#5911
35K
21.75 mi12:59:502:33:547:055:05
6:48
#5830
23M
23.00 mi13:08:402:42:447:058:50
7:03
#5663
24M
24.00 mi13:15:552:49:597:057:15
7:15
#5622
40K
24.85 mi13:22:132:56:177:066:18
7:22
#5599
25.2M
25.20 mi13:24:552:58:597:062:42
7:50
#5575
Finish
26.22 mi13:32:293:06:337:077:34
7:26
#5599
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM50-54Seg. OverallSeg. MalesSeg. M50-54
5K3.11 mi3.11 mi7355654265426178(Top 23%)5600(Top 37%)5600(Top 273%)
10K6.21 mi3.10 mi6848+5076150+3926150+3926417(Top 24%)5790(Top 38%)5790(Top 282%)
15K9.32 mi3.11 mi6608+2405956+1945956+1946178(Top 23%)5600(Top 37%)5600(Top 273%)
20K12.43 mi3.11 mi6457+1515829+1275829+1276108(Top 23%)5553(Top 37%)5553(Top 271%)
Half13.11 mi0.68 mi6429+285804+255804+255901(Top 22%)5410(Top 36%)5410(Top 264%)
25K15.53 mi2.42 mi6278+1515690+1145690+1145562(Top 21%)5117(Top 34%)5117(Top 249%)
30K18.64 mi3.11 mi6196+825611+795611+796143(Top 23%)5470(Top 36%)5470(Top 267%)
20M20.00 mi1.36 mi6025+1715470+1415470+1414572(Top 17%)4197(Top 28%)4197(Top 205%)
21M21.00 mi1.00 mi5911+1145370+1005370+1004759(Top 18%)4300(Top 28%)4300(Top 210%)
35K21.75 mi0.75 mi5830+815305+655305+654199(Top 16%)3849(Top 25%)3849(Top 188%)
23M23.00 mi1.25 mi5663+1675164+1415164+1414078(Top 15%)3754(Top 25%)3754(Top 183%)
24M24.00 mi1.00 mi5622+415121+435121+436024(Top 23%)5122(Top 34%)5122(Top 250%)
40K24.85 mi0.85 mi5599+235095+265095+265858(Top 22%)4924(Top 32%)4924(Top 240%)
25.2M25.20 mi0.35 mi5575+245069+265069+265504(Top 21%)4603(Top 30%)4603(Top 224%)
Finish26.22 mi1.02 mi5599-245071-25071-27919(Top 30%)6111(Top 40%)6111(Top 298%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 23%
×21stories
+97ft-345ft

Overall

6178

Males

5600

M50-54

5600

5K→10K

3.1 - 6.2 mi

Top 24%
×5stories
+79ft-138ft

Overall

6417

Males

5790

M50-54

5790

10K→15K

6.2 - 9.3 mi

Top 23%
×3stories
+67ft-78ft

Overall

6178

Males

5600

M50-54

5600

15K→20K

9.3 - 12.4 mi

Top 23%
×5stories
+106ft-86ft

Overall

6108

Males

5553

M50-54

5553

20K→Half

12.4 - 13.1 mi

Top 22%
×2stories
+19ft-37ft

Overall

5901

Males

5410

M50-54

5410

Half→25K

13.1 - 15.5 mi

Top 21%
×4stories
+66ft-88ft

Overall

5562

Males

5117

M50-54

5117

25K→30K

15.5 - 18.6 mi

Top 23%
×9stories
+181ft-148ft

Overall

6143

Males

5470

M50-54

5470

30K→20M

18.6 - 20.0 mi

Top 17%
×5stories
+64ft-50ft

Overall

4572

Males

4197

M50-54

4197

20M→21M

20.0 - 21.0 mi

Top 18%
×8stories
+106ft-24ft

Overall

4759

Males

4300

M50-54

4300

21M→35K

21.0 - 21.8 mi

Top 16%
×7stories
+17ft-86ft

Overall

4199

Males

3849

M50-54

3849

35K→23M

21.8 - 23.0 mi

Top 15%
×5stories
+23ft-63ft

Overall

4078

Males

3754

M50-54

3754

23M→24M

23.0 - 24.0 mi

Top 23%
×6stories
+12ft-82ft

Overall

6024

Males

5122

M50-54

5122

24M→40K

24.0 - 24.9 mi

Top 22%
×1story
+6ft-20ft

Overall

5858

Males

4924

M50-54

4924

40K→25.2M

24.9 - 25.2 mi

Top 21%
×1story
+13ft-16ft

Overall

5504

Males

4603

M50-54

4603

25.2M→Finish

25.2 - 26.2 mi

Top 30%
×2stories
+22ft-21ft

Overall

7919

Males

6111

M50-54

6111

Passing Analysis

Category:
Athletes Passed
2104
Passed By
348
Net Change
+1756
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#7355
5K → 10K54942+507#7355#6848
10K → 15K26828+240#6848#6608
15K → 20K18635+151#6608#6457
20K → Half346+28#6457#6429
Half → 25K16514+151#6429#6278
25K → 30K15674+82#6278#6196
30K → 20M1732+171#6196#6025
20M → 21M1228+114#6025#5911
21M → 35K876+81#5911#5830
35K → 23M1692+167#5830#5663
23M → 24M6625+41#5663#5622
24M → 40K5229+23#5622#5599
40K → 25.2M339+24#5599#5575
25.2M → Finish4468-24#5575#5599
TOTALS2104348+1756
📊

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