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BOSTON MARATHON 2025

Kelvin Chan

Bib: 12598•M

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Male)
#0 / 16105
Masters (Masters Men)
#0 / 10463
Division (M45-49)
#0 / 2386
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent
Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
5K· 3.11 mi
8:02/mi
24:57
↑ 97↓ 3451.5%
10K· 6.21 mi
8:22/mi
50:58
↑ 79↓ 1380.4%
15K· 9.32 mi
8:32/mi
1:17:29
↑ 67↓ 78
20K· 12.43 mi
8:11/mi
1:42:55
↑ 106↓ 860.1%
Half· 13.11 mi
8:21/mi
1:48:37
↑ 19↓ 370.5%
25K· 15.53 mi
8:36/mi
2:09:28
↑ 66↓ 880.2%
30K· 18.64 mi
8:59/mi
2:37:23
↑ 181↓ 1480.2%
20M
8:47/mi
2:49:19
↑ 64↓ 500.2%
21M
9:18/mi
2:58:37
↑ 106↓ 241.6%
35K· 21.75 mi
7:30/mi
3:04:14
↑ 17↓ 861.7%
23M
9:37/mi
3:16:17
↑ 23↓ 630.6%
24M
10:17/mi
3:26:34
↓ 821.3%
40K· 24.85 mi
10:26/mi
3:35:29
↓ 200.3%
25.2M
10:50/mi
3:39:13
↑ 13↓ 160.2%
Finish· 26.22 mi
7:50/mi
3:47:12
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:48:37
Pace8:17 /mi
2nd Half
Distance13.11 mi
Time1:58:35
Pace9:03 /mi
📊Positive Split: 9.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:53:0824:578:0224:57
8:02
-
10K
6.21 mi11:19:0950:588:1226:01
8:22
+0:20
15K
9.32 mi11:45:401:17:298:1926:31
8:32
+0:10
20K
12.43 mi12:11:061:42:558:1725:26
8:11
-0:21
Half
13.11 mi12:16:481:48:378:175:42
8:21
+0:10
25K
15.53 mi12:37:392:09:288:2020:51
8:36
+0:15
30K
18.64 mi13:05:342:37:238:2727:55
8:59
+0:23
20M
20.00 mi13:17:302:49:198:2811:56
8:47
-0:12
21M
21.00 mi13:26:482:58:378:309:18
9:18
+0:31
35K
21.75 mi13:32:253:04:148:285:37
7:30
-1:48
23M
23.00 mi13:44:283:16:178:3212:03
9:37
+2:07
24M
24.00 mi13:54:453:26:348:3610:17
10:17
+0:40
40K
24.85 mi14:03:403:35:298:408:55
10:26
+0:09
25.2M
25.20 mi14:07:243:39:138:423:44
10:50
+0:24
Finish
26.22 mi14:15:233:47:128:407:59
7:50
-3:00

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

7:30 /mi

Average Pace

8:40 /mi

Slowest Pace

10:50 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

38:33

17% of race

Time at Steady Pace

2:24:22

64% of race

Time at Slower Pace

44:17

19% of race

Average Pace: 8:40 /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 mi10:53:0824:578:0224:57
8:02
#16827
10K
6.21 mi11:19:0950:588:1226:01
8:22
#17988
15K
9.32 mi11:45:401:17:298:1926:31
8:32
#18480
20K
12.43 mi12:11:061:42:558:1725:26
8:11
#17881
Half
13.11 mi12:16:481:48:378:175:42
8:21
#17883
25K
15.53 mi12:37:392:09:288:2020:51
8:36
#17806
30K
18.64 mi13:05:342:37:238:2727:55
8:59
#17745
20M
20.00 mi13:17:302:49:198:2811:56
8:47
#17553
21M
21.00 mi13:26:482:58:378:309:18
9:18
#17400
35K
21.75 mi13:32:253:04:148:285:37
7:30
#17077
23M
23.00 mi13:44:283:16:178:3212:03
9:37
#17251
24M
24.00 mi13:54:453:26:348:3610:17
10:17
#17585
40K
24.85 mi14:03:403:35:298:408:55
10:26
#17825
25.2M
25.20 mi14:07:243:39:138:423:44
10:50
#17884
Finish
26.22 mi14:15:233:47:128:407:59
7:50
#17644
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM45-49Seg. OverallSeg. MalesSeg. M45-49
5K3.11 mi3.11 mi16827111341113419525(Top 69%)12283(Top 76%)12283(Top 515%)
10K6.21 mi3.10 mi17988-116111616-48211616-48219019(Top 67%)12069(Top 75%)12069(Top 506%)
15K9.32 mi3.11 mi18480-49211814-19811814-19819525(Top 69%)12283(Top 76%)12283(Top 515%)
20K12.43 mi3.11 mi17881+59911563+25111563+25116220(Top 57%)10838(Top 67%)10838(Top 454%)
Half13.11 mi0.68 mi17883-211556+711556+718246(Top 64%)11724(Top 73%)11724(Top 491%)
25K15.53 mi2.42 mi17806+7711512+4411512+4417791(Top 63%)11436(Top 71%)11436(Top 479%)
30K18.64 mi3.11 mi17745+6111438+7411438+7417606(Top 62%)11196(Top 70%)11196(Top 469%)
20M20.00 mi1.36 mi17553+19211327+11111327+11115552(Top 55%)10188(Top 63%)10188(Top 427%)
21M21.00 mi1.00 mi17400+15311234+9311234+9315139(Top 53%)9851(Top 61%)9851(Top 413%)
35K21.75 mi0.75 mi17077+32311076+15811076+1588690(Top 31%)6699(Top 42%)6699(Top 281%)
23M23.00 mi1.25 mi17251-17411119-4311119-4319160(Top 67%)11516(Top 72%)11516(Top 483%)
24M24.00 mi1.00 mi17585-33411240-12111240-12122170(Top 78%)12886(Top 80%)12886(Top 540%)
40K24.85 mi0.85 mi17825-24011326-8611326-8621704(Top 76%)12602(Top 78%)12602(Top 528%)
25.2M25.20 mi0.35 mi17884-5911343-1711343-1720070(Top 71%)11812(Top 73%)11812(Top 495%)
Finish26.22 mi1.02 mi17644+24011214+12911214+12911685(Top 41%)7874(Top 49%)7874(Top 330%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 69%
×21story building
+97ft-345ft

Overall

19525

Males

12283

M45-49

12283

5K→10K

3.1 - 6.2 mi

Top 67%
×5story building
+79ft-138ft

Overall

19019

Males

12069

M45-49

12069

10K→15K

6.2 - 9.3 mi

Top 69%
×3story building
+67ft-78ft

Overall

19525

Males

12283

M45-49

12283

15K→20K

9.3 - 12.4 mi

Top 57%
×5story building
+106ft-86ft

Overall

16220

Males

10838

M45-49

10838

20K→Half

12.4 - 13.1 mi

Top 64%
×2story building
+19ft-37ft

Overall

18246

Males

11724

M45-49

11724

Half→25K

13.1 - 15.5 mi

Top 63%
×4story building
+66ft-88ft

Overall

17791

Males

11436

M45-49

11436

25K→30K

15.5 - 18.6 mi

Top 62%
×9story building
+181ft-148ft

Overall

17606

Males

11196

M45-49

11196

30K→20M

18.6 - 20.0 mi

Top 55%
×5story building
+64ft-50ft

Overall

15552

Males

10188

M45-49

10188

20M→21M

20.0 - 21.0 mi

Top 53%
×8story building
+106ft-24ft

Overall

15139

Males

9851

M45-49

9851

21M→35K

21.0 - 21.8 mi

Top 31%
×7story building
+17ft-86ft

Overall

8690

Males

6699

M45-49

6699

35K→23M

21.8 - 23.0 mi

Top 67%
×5story building
+23ft-63ft

Overall

19160

Males

11516

M45-49

11516

23M→24M

23.0 - 24.0 mi

Top 78%
×6story building
+12ft-82ft

Overall

22170

Males

12886

M45-49

12886

24M→40K

24.0 - 24.9 mi

Top 76%
×1story
+6ft-20ft

Overall

21704

Males

12602

M45-49

12602

40K→25.2M

24.9 - 25.2 mi

Top 71%
×1story
+13ft-16ft

Overall

20070

Males

11812

M45-49

11812

25.2M→Finish

25.2 - 26.2 mi

Top 41%
×2story building
+22ft-21ft

Overall

11685

Males

7874

M45-49

7874

Passing Analysis

Category:
Athletes Passed
2308
Passed By
3125
Net Change
-817
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#16827
5K → 10K511212-1161#16827#17988
10K → 15K65557-492#17988#18480
15K → 20K61112+599#18480#17881
20K → Half3032-2#17881#17883
Half → 25K195118+77#17883#17806
25K → 30K255194+61#17806#17745
30K → 20M21119+192#17745#17553
20M → 21M19037+153#17553#17400
21M → 35K3230+323#17400#17077
35K → 23M72246-174#17077#17251
23M → 24M26360-334#17251#17585
24M → 40K16256-240#17585#17825
40K → 25.2M1978-59#17825#17884
25.2M → Finish2444+240#17884#17644
TOTALS23083125-817
📊

Passing Visuals

Category:
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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