Boston Marathon logo
BOSTON MARATHON 2023

Jonathan Fong

Bib: 27664•M

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 26622
Gender (Male)
#0 / 15176
Masters (Masters Men)
#0 / 9891
Division (M40-44)
#0 / 2241
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
24:21
Rank: #12725
Start → 5K
24:21 | 7:50/mi
10K· 6.21 mi
48:28
Rank: #12701 (+24)
5K → 10K
24:07 | 7:46/mi
15K· 9.32 mi
1:13:51
Rank: #13758 (-1057)
10K → 15K
25:23 | 8:10/mi
20K· 12.43 mi
1:41:00
Rank: #15073 (-1315)
15K → 20K
27:09 | 8:44/mi
Half· 13.11 mi
1:46:56
Rank: #15291 (-218)
20K → Half
5:56 | 8:42/mi
25K· 15.53 mi
2:10:52
Rank: #16885 (-1594)
Half → 25K
23:56 | 9:52/mi
30K· 18.64 mi
2:42:39
Rank: #18133 (-1248)
25K → 30K
31:47 | 10:14/mi
20M
2:59:23
Rank: #19221 (-1088)
30K → 20M
16:44 | 12:19/mi
21M
3:12:43
Rank: #19846 (-625)
20M → 21M
13:20 | 13:20/mi
35K· 21.75 mi
3:20:57
Rank: #20073 (-227)
21M → 35K
8:14 | 11:00/mi
23M
3:34:51
Rank: #20273 (-200)
35K → 23M
13:54 | 11:06/mi
24M
3:45:30
Rank: #20379 (-106)
23M → 24M
10:39 | 10:39/mi
40K· 24.85 mi
3:54:58
Rank: #20464 (-85)
24M → 40K
9:28 | 11:04/mi
25.2M
3:58:53
Rank: #20483 (-19)
40K → 25.2M
3:55 | 11:21/mi
Finish· 26.22 mi
4:09:56
Rank: #20650 (-167)
25.2M → Finish
11:03 | 10:51/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
Time1:46:56
Pace8:09 /mi
2nd Half
Distance13.11 mi
Time2:23:00
Pace10:55 /mi
📊Positive Split: 33.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:40:4124:217:5024:21
7:50
-
10K
6.21 mi12:04:4848:287:4824:07
7:46
-0:04
15K
9.32 mi12:30:111:13:517:5525:23
8:10
+0:24
20K
12.43 mi12:57:201:41:008:0827:09
8:44
+0:34
Half
13.11 mi13:03:161:46:568:095:56
8:42
-0:02
25K
15.53 mi13:27:122:10:528:2523:56
9:52
+1:10
30K
18.64 mi13:58:592:42:398:4431:47
10:14
+0:22
20M
20.00 mi14:15:432:59:238:5816:44
12:19
+2:05
21M
21.00 mi14:29:033:12:439:1113:20
13:20
+1:01
35K
21.75 mi14:37:173:20:579:148:14
11:00
-2:20
23M
23.00 mi14:51:113:34:519:2013:54
11:06
+0:06
24M
24.00 mi15:01:503:45:309:2410:39
10:39
-0:27
40K
24.85 mi15:11:183:54:589:279:28
11:04
+0:25
25.2M
25.20 mi15:15:133:58:539:293:55
11:21
+0:17
Finish
26.22 mi15:26:164:09:569:3211:03
10:51
-0:30

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

7:46 /mi

Average Pace

9:32 /mi

Slowest Pace

13:20 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:46:56

43% of race

Time at Steady Pace

1:52:56

45% of race

Time at Slower Pace

30:04

12% of race

Average Pace: 9:32 /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 mi11:40:4124:217:5024:21
7:50
#12725
10K
6.21 mi12:04:4848:287:4824:07
7:46
#12701
15K
9.32 mi12:30:111:13:517:5525:23
8:10
#13758
20K
12.43 mi12:57:201:41:008:0827:09
8:44
#15073
Half
13.11 mi13:03:161:46:568:095:56
8:42
#15291
25K
15.53 mi13:27:122:10:528:2523:56
9:52
#16885
30K
18.64 mi13:58:592:42:398:4431:47
10:14
#18133
20M
20.00 mi14:15:432:59:238:5816:44
12:19
#19221
21M
21.00 mi14:29:033:12:439:1113:20
13:20
#19846
35K
21.75 mi14:37:173:20:579:148:14
11:00
#20073
23M
23.00 mi14:51:113:34:519:2013:54
11:06
#20273
24M
24.00 mi15:01:503:45:309:2410:39
10:39
#20379
40K
24.85 mi15:11:183:54:589:279:28
11:04
#20464
25.2M
25.20 mi15:15:133:58:539:293:55
11:21
#20483
Finish
26.22 mi15:26:164:09:569:3211:03
10:51
#20650
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM40-44Seg. OverallSeg. MalesSeg. M40-44
5K3.11 mi3.11 mi127259424942415651(Top 59%)10554(Top 70%)10554(Top 471%)
10K6.21 mi3.10 mi12701+249422+29422+212789(Top 48%)9470(Top 62%)9470(Top 423%)
15K9.32 mi3.11 mi13758-10579825-4039825-40315651(Top 59%)10554(Top 70%)10554(Top 471%)
20K12.43 mi3.11 mi15073-131510326-50110326-50118348(Top 69%)11625(Top 77%)11625(Top 519%)
Half13.11 mi0.68 mi15291-21810403-7710403-7718905(Top 71%)11870(Top 78%)11870(Top 530%)
25K15.53 mi2.42 mi16885-159410980-57710980-57721899(Top 82%)13091(Top 86%)13091(Top 584%)
30K18.64 mi3.11 mi18133-124811464-48411464-48421592(Top 81%)12893(Top 85%)12893(Top 575%)
20M20.00 mi1.36 mi19221-108811921-45711921-45724552(Top 92%)14161(Top 93%)14161(Top 632%)
21M21.00 mi1.00 mi19846-62512173-25212173-25224420(Top 92%)14094(Top 93%)14094(Top 629%)
35K21.75 mi0.75 mi20073-22712253-8012253-8023308(Top 88%)13517(Top 89%)13517(Top 603%)
23M23.00 mi1.25 mi20273-20012331-7812331-7822530(Top 85%)13164(Top 87%)13164(Top 587%)
24M24.00 mi1.00 mi20379-10612366-3512366-3522333(Top 84%)13029(Top 86%)13029(Top 581%)
40K24.85 mi0.85 mi20464-8512398-3212398-3222485(Top 84%)13068(Top 86%)13068(Top 583%)
25.2M25.20 mi0.35 mi20483-19123981239821224(Top 80%)12490(Top 82%)12490(Top 557%)
Finish26.22 mi1.02 mi20650-16712457-5912457-5923676(Top 89%)13654(Top 90%)13654(Top 609%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 59%
×21stories
+97ft-345ft

Overall

15651

Males

10554

M40-44

10554

5K→10K

3.1 - 6.2 mi

Top 48%
×5stories
+79ft-138ft

Overall

12789

Males

9470

M40-44

9470

10K→15K

6.2 - 9.3 mi

Top 59%
×3stories
+67ft-78ft

Overall

15651

Males

10554

M40-44

10554

15K→20K

9.3 - 12.4 mi

Top 69%
×5stories
+106ft-86ft

Overall

18348

Males

11625

M40-44

11625

20K→Half

12.4 - 13.1 mi

Top 71%
×2stories
+19ft-37ft

Overall

18905

Males

11870

M40-44

11870

Half→25K

13.1 - 15.5 mi

Top 82%
×4stories
+66ft-88ft

Overall

21899

Males

13091

M40-44

13091

25K→30K

15.5 - 18.6 mi

Top 81%
×9stories
+181ft-148ft

Overall

21592

Males

12893

M40-44

12893

30K→20M

18.6 - 20.0 mi

Top 92%
×5stories
+64ft-50ft

Overall

24552

Males

14161

M40-44

14161

20M→21M

20.0 - 21.0 mi

Top 92%
×8stories
+106ft-24ft

Overall

24420

Males

14094

M40-44

14094

21M→35K

21.0 - 21.8 mi

Top 88%
×7stories
+17ft-86ft

Overall

23308

Males

13517

M40-44

13517

35K→23M

21.8 - 23.0 mi

Top 85%
×5stories
+23ft-63ft

Overall

22530

Males

13164

M40-44

13164

23M→24M

23.0 - 24.0 mi

Top 84%
×6stories
+12ft-82ft

Overall

22333

Males

13029

M40-44

13029

24M→40K

24.0 - 24.9 mi

Top 84%
×1story
+6ft-20ft

Overall

22485

Males

13068

M40-44

13068

40K→25.2M

24.9 - 25.2 mi

Top 80%
×1story
+13ft-16ft

Overall

21224

Males

12490

M40-44

12490

25.2M→Finish

25.2 - 26.2 mi

Top 89%
×2stories
+22ft-21ft

Overall

23676

Males

13654

M40-44

13654

Passing Analysis

Category:
Athletes Passed
530
Passed By
8455
Net Change
-7925
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#12725
5K → 10K317293+24#12725#12701
10K → 15K251082-1057#12701#13758
15K → 20K261341-1315#13758#15073
20K → Half12230-218#15073#15291
Half → 25K61600-1594#15291#16885
25K → 30K221270-1248#16885#18133
30K → 20M51093-1088#18133#19221
20M → 21M8633-625#19221#19846
21M → 35K15242-227#19846#20073
35K → 23M25225-200#20073#20273
23M → 24M12118-106#20273#20379
24M → 40K25110-85#20379#20464
40K → 25.2M1938-19#20464#20483
25.2M → Finish13180-167#20483#20650
TOTALS5308455-7925
📊

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