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BOSTON MARATHON 2025

Sun Jin

Bib: 13065•M

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Top 41%
Gender (Male)
#0 / 16105
Masters (Masters Men)
#0 / 10463
Top 44%
Division (M50-54)
#0 / 1996
Top 47%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
23:23
Rank: #12452
Start → 5K
23:23 | 7:32/mi
10K· 6.21 mi
46:54
Rank: #12550 (-98)
5K → 10K
23:31 | 7:34/mi
15K· 9.32 mi
1:10:18
Rank: #12344 (+206)
10K → 15K
23:24 | 7:32/mi
20K· 12.43 mi
1:34:21
Rank: #12418 (-74)
15K → 20K
24:03 | 7:44/mi
Half· 13.11 mi
1:39:31
Rank: #12418
20K → Half
5:10 | 7:34/mi
25K· 15.53 mi
1:58:25
Rank: #12377 (+41)
Half → 25K
18:54 | 7:48/mi
30K· 18.64 mi
2:23:09
Rank: #12066 (+311)
25K → 30K
24:44 | 7:58/mi
20M
2:34:04
Rank: #11946 (+120)
30K → 20M
10:55 | 8:02/mi
21M
2:42:53
Rank: #11931 (+15)
20M → 21M
8:49 | 8:49/mi
35K· 21.75 mi
2:48:47
Rank: #11899 (+32)
21M → 35K
5:54 | 7:53/mi
23M
2:59:08
Rank: #11881 (+18)
35K → 23M
10:21 | 8:16/mi
24M
3:07:04
Rank: #11805 (+76)
23M → 24M
7:56 | 7:56/mi
40K· 24.85 mi
3:14:04
Rank: #11757 (+48)
24M → 40K
7:00 | 8:11/mi
25.2M
3:16:54
Rank: #11663 (+94)
40K → 25.2M
2:50 | 8:13/mi
Finish· 26.22 mi
3:25:17
Rank: #11778 (-115)
25.2M → Finish
8:23 | 8:13/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:39:31
Pace7:35 /mi
2nd Half
Distance13.11 mi
Time1:45:46
Pace8:04 /mi
📊Positive Split: 6.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:55:3023:237:3223:23
7:32
-
10K
6.21 mi11:19:0146:547:3323:31
7:34
+0:02
15K
9.32 mi11:42:251:10:187:3323:24
7:32
-0:02
20K
12.43 mi12:06:281:34:217:3624:03
7:44
+0:12
Half
13.11 mi12:11:381:39:317:355:10
7:34
-0:10
25K
15.53 mi12:30:321:58:257:3718:54
7:48
+0:14
30K
18.64 mi12:55:162:23:097:4124:44
7:58
+0:10
20M
20.00 mi13:06:112:34:047:4210:55
8:02
+0:04
21M
21.00 mi13:15:002:42:537:458:49
8:49
+0:47
35K
21.75 mi13:20:542:48:477:465:54
7:53
-0:56
23M
23.00 mi13:31:152:59:087:4710:21
8:16
+0:23
24M
24.00 mi13:39:113:07:047:487:56
7:56
-0:20
40K
24.85 mi13:46:113:14:047:487:00
8:11
+0:15
25.2M
25.20 mi13:49:013:16:547:492:50
8:13
+0:02
Finish
26.22 mi13:57:243:25:177:508:23
8:13
0:00

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

7:32 /mi

Average Pace

7:50 /mi

Slowest Pace

8:49 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:16:28

96% of race

Time at Steady Pace

8:49

4% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:50 /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 mi10:55:3023:237:3223:23
7:32
#12452
10K
6.21 mi11:19:0146:547:3323:31
7:34
#12550
15K
9.32 mi11:42:251:10:187:3323:24
7:32
#12344
20K
12.43 mi12:06:281:34:217:3624:03
7:44
#12418
Half
13.11 mi12:11:381:39:317:355:10
7:34
#12418
25K
15.53 mi12:30:321:58:257:3718:54
7:48
#12377
30K
18.64 mi12:55:162:23:097:4124:44
7:58
#12066
20M
20.00 mi13:06:112:34:047:4210:55
8:02
#11946
21M
21.00 mi13:15:002:42:537:458:49
8:49
#11931
35K
21.75 mi13:20:542:48:477:465:54
7:53
#11899
23M
23.00 mi13:31:152:59:087:4710:21
8:16
#11881
24M
24.00 mi13:39:113:07:047:487:56
7:56
#11805
40K
24.85 mi13:46:113:14:047:487:00
8:11
#11757
25.2M
25.20 mi13:49:013:16:547:492:50
8:13
#11663
Finish
26.22 mi13:57:243:25:177:508:23
8:13
#11778
Faster pace
Steady pace
Slower pace
Est.Checkpoint not recorded (estimated)
~Segment time uses estimated prior

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM50-54Seg. OverallSeg. MalesSeg. M50-54
5K3.11 mi3.11 mi124529378937812041(Top 42%)9083(Top 56%)9083(Top 455%)
10K6.21 mi3.10 mi12550-989415-379415-3712730(Top 45%)9477(Top 59%)9477(Top 475%)
15K9.32 mi3.11 mi12344+2069286+1299286+12912041(Top 42%)9083(Top 56%)9083(Top 455%)
20K12.43 mi3.11 mi12418-749285+19285+112744(Top 45%)9298(Top 58%)9298(Top 466%)
Half13.11 mi0.68 mi124189281+49281+412281(Top 43%)9136(Top 57%)9136(Top 458%)
25K15.53 mi2.42 mi12377+419222+599222+5912279(Top 43%)8978(Top 56%)8978(Top 450%)
30K18.64 mi3.11 mi12066+3119008+2149008+21411100(Top 39%)8235(Top 51%)8235(Top 413%)
20M20.00 mi1.36 mi11946+1208912+968912+9610656(Top 38%)7864(Top 49%)7864(Top 394%)
21M21.00 mi1.00 mi11931+158865+478865+4712371(Top 44%)8544(Top 53%)8544(Top 428%)
35K21.75 mi0.75 mi11899+328829+368829+3611436(Top 40%)8070(Top 50%)8070(Top 404%)
23M23.00 mi1.25 mi11881+188775+548775+5411802(Top 42%)8139(Top 51%)8139(Top 408%)
24M24.00 mi1.00 mi11805+768702+738702+7310758(Top 38%)7562(Top 47%)7562(Top 379%)
40K24.85 mi0.85 mi11757+488654+488654+4811453(Top 40%)7788(Top 48%)7788(Top 390%)
25.2M25.20 mi0.35 mi11663+948590+648590+647294(Top 26%)5462(Top 34%)5462(Top 274%)
Finish26.22 mi1.02 mi11778-1158605-158605-1514394(Top 51%)9192(Top 57%)9192(Top 461%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 42%
×21stories
+97ft-345ft

Overall

12041

Males

9083

M50-54

9083

5K→10K

3.1 - 6.2 mi

Top 45%
×5stories
+79ft-138ft

Overall

12730

Males

9477

M50-54

9477

10K→15K

6.2 - 9.3 mi

Top 42%
×3stories
+67ft-78ft

Overall

12041

Males

9083

M50-54

9083

15K→20K

9.3 - 12.4 mi

Top 45%
×5stories
+106ft-86ft

Overall

12744

Males

9298

M50-54

9298

20K→Half

12.4 - 13.1 mi

Top 43%
×2stories
+19ft-37ft

Overall

12281

Males

9136

M50-54

9136

Half→25K

13.1 - 15.5 mi

Top 43%
×4stories
+66ft-88ft

Overall

12279

Males

8978

M50-54

8978

25K→30K

15.5 - 18.6 mi

Top 39%
×9stories
+181ft-148ft

Overall

11100

Males

8235

M50-54

8235

30K→20M

18.6 - 20.0 mi

Top 38%
×5stories
+64ft-50ft

Overall

10656

Males

7864

M50-54

7864

20M→21M

20.0 - 21.0 mi

Top 44%
×8stories
+106ft-24ft

Overall

12371

Males

8544

M50-54

8544

21M→35K

21.0 - 21.8 mi

Top 40%
×7stories
+17ft-86ft

Overall

11436

Males

8070

M50-54

8070

35K→23M

21.8 - 23.0 mi

Top 42%
×5stories
+23ft-63ft

Overall

11802

Males

8139

M50-54

8139

23M→24M

23.0 - 24.0 mi

Top 38%
×6stories
+12ft-82ft

Overall

10758

Males

7562

M50-54

7562

24M→40K

24.0 - 24.9 mi

Top 40%
×1story
+6ft-20ft

Overall

11453

Males

7788

M50-54

7788

40K→25.2M

24.9 - 25.2 mi

Top 26%
×1story
+13ft-16ft

Overall

7294

Males

5462

M50-54

5462

25.2M→Finish

25.2 - 26.2 mi

Top 51%
×2stories
+22ft-21ft

Overall

14394

Males

9192

M50-54

9192

Passing Analysis

Category:
Athletes Passed
2131
Passed By
1457
Net Change
+674
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#12452
5K → 10K233331-98#12452#12550
10K → 15K30498+206#12550#12344
15K → 20K161235-74#12344#12418
20K → Half31310#12418#12418
Half → 25K173132+41#12418#12377
25K → 30K39584+311#12377#12066
30K → 20M17252+120#12066#11946
20M → 21M11297+15#11946#11931
21M → 35K7038+32#11931#11899
35K → 23M119101+18#11899#11881
23M → 24M11539+76#11881#11805
24M → 40K9143+48#11805#11757
40K → 25.2M995+94#11757#11663
25.2M → Finish56171-115#11663#11778
TOTALS21311457+674
📊

Passing Visuals

Category:
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🔥Passing Intensity

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🔄Passing Circle

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🌊Position Flow

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🏃Race Lanes

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Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing