Boston Marathon logo
BOSTON MARATHON 2025

Taehyun Lee

Bib: 2745•M

VA

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 28404
Top 15%
Gender (Male)
#0 / 16105
Top 24%
Masters (Masters Men)
#0 / 10463
Top 10%
Division (M50-54)
#0 / 1996
Top 5%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
19:54
Rank: #3151
Start → 5K
19:54 | 6:24/mi
10K· 6.21 mi
40:23
Rank: #3766 (-615)
5K → 10K
20:29 | 6:36/mi
15K· 9.32 mi
1:01:30
Rank: #4375 (-609)
10K → 15K
21:07 | 6:48/mi
20K· 12.43 mi
1:22:58
Rank: #4788 (-413)
15K → 20K
21:28 | 6:55/mi
Half· 13.11 mi
1:27:41
Rank: #4903 (-115)
20K → Half
4:43 | 6:55/mi
25K· 15.53 mi
1:44:35
Rank: #5084 (-181)
Half → 25K
16:54 | 6:58/mi
30K· 18.64 mi
2:06:33
Rank: #5057 (+27)
25K → 30K
21:58 | 7:04/mi
20M
2:16:09
Rank: #4984 (+73)
30K → 20M
9:36 | 7:04/mi
21M
2:23:32
Rank: #4889 (+95)
20M → 21M
7:23 | 7:23/mi
35K· 21.75 mi
2:28:25
Rank: #4745 (+144)
21M → 35K
4:53 | 6:32/mi
23M
2:37:02
Rank: #4609 (+136)
35K → 23M
8:37 | 6:53/mi
24M
2:43:36
Rank: #4441 (+168)
23M → 24M
6:34 | 6:34/mi
40K· 24.85 mi
2:49:23
Rank: #4334 (+107)
24M → 40K
5:47 | 6:46/mi
25.2M
2:51:57
Rank: #4303 (+31)
40K → 25.2M
2:34 | 7:27/mi
Finish· 26.22 mi
2:58:26
Rank: #4154 (+149)
25.2M → Finish
6:29 | 6:22/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
Time1:27:41
Pace6:41 /mi
2nd Half
Distance13.11 mi
Time1:30:45
Pace6:55 /mi
📊Positive Split: 3.5% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:21:3819:546:2419:54
6:24
-
10K
6.21 mi10:42:0740:236:3020:29
6:36
+0:12
15K
9.32 mi11:03:141:01:306:3621:07
6:48
+0:12
20K
12.43 mi11:24:421:22:586:4121:28
6:55
+0:07
Half
13.11 mi11:29:251:27:416:414:43
6:55
0:00
25K
15.53 mi11:46:191:44:356:4416:54
6:58
+0:03
30K
18.64 mi12:08:172:06:336:4721:58
7:04
+0:06
20M
20.00 mi12:17:532:16:096:489:36
7:04
0:00
21M
21.00 mi12:25:162:23:326:507:23
7:23
+0:19
35K
21.75 mi12:30:092:28:256:494:53
6:32
-0:51
23M
23.00 mi12:38:462:37:026:508:37
6:53
+0:21
24M
24.00 mi12:45:202:43:366:496:34
6:34
-0:19
40K
24.85 mi12:51:072:49:236:495:47
6:46
+0:12
25.2M
25.20 mi12:53:412:51:576:492:34
7:27
+0:41
Finish
26.22 mi13:00:102:58:266:496:29
6:22
-1:05

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

6:22 /mi

Average Pace

6:49 /mi

Slowest Pace

7:27 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:16:55

77% of race

Time at Steady Pace

41:31

23% 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 mi10:21:3819:546:2419:54
6:24
#3151
10K
6.21 mi10:42:0740:236:3020:29
6:36
#3766
15K
9.32 mi11:03:141:01:306:3621:07
6:48
#4375
20K
12.43 mi11:24:421:22:586:4121:28
6:55
#4788
Half
13.11 mi11:29:251:27:416:414:43
6:55
#4903
25K
15.53 mi11:46:191:44:356:4416:54
6:58
#5084
30K
18.64 mi12:08:172:06:336:4721:58
7:04
#5057
20M
20.00 mi12:17:532:16:096:489:36
7:04
#4984
21M
21.00 mi12:25:162:23:326:507:23
7:23
#4889
35K
21.75 mi12:30:092:28:256:494:53
6:32
#4745
23M
23.00 mi12:38:462:37:026:508:37
6:53
#4609
24M
24.00 mi12:45:202:43:366:496:34
6:34
#4441
40K
24.85 mi12:51:072:49:236:495:47
6:46
#4334
25.2M
25.20 mi12:53:412:51:576:492:34
7:27
#4303
Finish
26.22 mi13:00:102:58:266:496:29
6:22
#4154
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM50-54Seg. OverallSeg. MalesSeg. M50-54
5K3.11 mi3.11 mi3151299429946036(Top 21%)5486(Top 34%)5486(Top 275%)
10K6.21 mi3.10 mi3766-6153566-5723566-5724414(Top 16%)4139(Top 26%)4139(Top 207%)
15K9.32 mi3.11 mi4375-6094113-5474113-5476036(Top 21%)5486(Top 34%)5486(Top 275%)
20K12.43 mi3.11 mi4788-4134467-3544467-3546250(Top 22%)5622(Top 35%)5622(Top 282%)
Half13.11 mi0.68 mi4903-1154568-1014568-1016906(Top 24%)6126(Top 38%)6126(Top 307%)
25K15.53 mi2.42 mi5084-1814714-1464714-1466092(Top 21%)5464(Top 34%)5464(Top 274%)
30K18.64 mi3.11 mi5057+274660+544660+545128(Top 18%)4640(Top 29%)4640(Top 232%)
20M20.00 mi1.36 mi4984+734592+684592+684457(Top 16%)4055(Top 25%)4055(Top 203%)
21M21.00 mi1.00 mi4889+954508+844508+844006(Top 14%)3629(Top 23%)3629(Top 182%)
35K21.75 mi0.75 mi4745+1444378+1304378+1302605(Top 9%)2424(Top 15%)2424(Top 121%)
23M23.00 mi1.25 mi4609+1364248+1304248+1303120(Top 11%)2850(Top 18%)2850(Top 143%)
24M24.00 mi1.00 mi4441+1684097+1514097+1512339(Top 8%)2164(Top 13%)2164(Top 108%)
40K24.85 mi0.85 mi4334+1073995+1023995+1022663(Top 9%)2420(Top 15%)2420(Top 121%)
25.2M25.20 mi0.35 mi4303+313966+293966+293132(Top 11%)2773(Top 17%)2773(Top 139%)
Finish26.22 mi1.02 mi4154+1493828+1383828+1382143(Top 8%)1961(Top 12%)1961(Top 98%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 21%
×21stories
+97ft-345ft

Overall

6036

Males

5486

M50-54

5486

5K→10K

3.1 - 6.2 mi

Top 16%
×5stories
+79ft-138ft

Overall

4414

Males

4139

M50-54

4139

10K→15K

6.2 - 9.3 mi

Top 21%
×3stories
+67ft-78ft

Overall

6036

Males

5486

M50-54

5486

15K→20K

9.3 - 12.4 mi

Top 22%
×5stories
+106ft-86ft

Overall

6250

Males

5622

M50-54

5622

20K→Half

12.4 - 13.1 mi

Top 24%
×2stories
+19ft-37ft

Overall

6906

Males

6126

M50-54

6126

Half→25K

13.1 - 15.5 mi

Top 21%
×4stories
+66ft-88ft

Overall

6092

Males

5464

M50-54

5464

25K→30K

15.5 - 18.6 mi

Top 18%
×9stories
+181ft-148ft

Overall

5128

Males

4640

M50-54

4640

30K→20M

18.6 - 20.0 mi

Top 16%
×5stories
+64ft-50ft

Overall

4457

Males

4055

M50-54

4055

20M→21M

20.0 - 21.0 mi

Top 14%
×8stories
+106ft-24ft

Overall

4006

Males

3629

M50-54

3629

21M→35K

21.0 - 21.8 mi

Top 9%
×7stories
+17ft-86ft

Overall

2605

Males

2424

M50-54

2424

35K→23M

21.8 - 23.0 mi

Top 11%
×5stories
+23ft-63ft

Overall

3120

Males

2850

M50-54

2850

23M→24M

23.0 - 24.0 mi

Top 8%
×6stories
+12ft-82ft

Overall

2339

Males

2164

M50-54

2164

24M→40K

24.0 - 24.9 mi

Top 9%
×1story
+6ft-20ft

Overall

2663

Males

2420

M50-54

2420

40K→25.2M

24.9 - 25.2 mi

Top 11%
×1story
+13ft-16ft

Overall

3132

Males

2773

M50-54

2773

25.2M→Finish

25.2 - 26.2 mi

Top 8%
×2stories
+22ft-21ft

Overall

2143

Males

1961

M50-54

1961

Passing Analysis

Category:
Athletes Passed
1297
Passed By
2300
Net Change
-1003
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#3151
5K → 10K8623-615#3151#3766
10K → 15K11620-609#3766#4375
15K → 20K46459-413#4375#4788
20K → Half3118-115#4788#4903
Half → 25K62243-181#4903#5084
25K → 30K175148+27#5084#5057
30K → 20M10734+73#5057#4984
20M → 21M11924+95#4984#4889
21M → 35K1462+144#4889#4745
35K → 23M14913+136#4745#4609
23M → 24M1724+168#4609#4441
24M → 40K1114+107#4441#4334
40K → 25.2M376+31#4334#4303
25.2M → Finish1512+149#4303#4154
TOTALS12972300-1003
📊

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