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BOSTON MARATHON 2025

Calvin Do

Bib: 1907•M

CA

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Top 43%
Gender (Male)
#0 / 16105
Masters (Masters Men)
#0 / 10463
Top 45%
Division (M55-59)
#0 / 1648
Top 31%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
23:30
Rank: #12770
Start → 5K
23:30 | 7:34/mi
10K· 6.21 mi
46:44
Rank: #12312 (+458)
5K → 10K
23:14 | 7:29/mi
15K· 9.32 mi
1:10:06
Rank: #12171 (+141)
10K → 15K
23:22 | 7:31/mi
20K· 12.43 mi
1:33:37
Rank: #11926 (+245)
15K → 20K
23:31 | 7:34/mi
Half· 13.11 mi
1:38:47
Rank: #11936 (-10)
20K → Half
5:10 | 7:34/mi
25K· 15.53 mi
1:57:36
Rank: #11924 (+12)
Half → 25K
18:49 | 7:46/mi
30K· 18.64 mi
2:22:35
Rank: #11802 (+122)
25K → 30K
24:59 | 8:02/mi
20M
2:33:44
Rank: #11773 (+29)
30K → 20M
11:09 | 8:12/mi
21M
2:42:37
Rank: #11839 (-66)
20M → 21M
8:53 | 8:53/mi
35K· 21.75 mi
2:48:45
Rank: #11882 (-43)
21M → 35K
6:08 | 8:12/mi
23M
2:59:06
Rank: #11861 (+21)
35K → 23M
10:21 | 8:16/mi
24M
3:07:25
Rank: #11913 (-52)
23M → 24M
8:19 | 8:19/mi
40K· 24.85 mi
3:15:06
Rank: #12097 (-184)
24M → 40K
7:41 | 8:59/mi
25.2M
3:18:17
Rank: #12096 (+1)
40K → 25.2M
3:11 | 9:14/mi
Finish· 26.22 mi
3:26:24
Rank: #12103 (-7)
25.2M → Finish
8:07 | 7:58/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:38:47
Pace7:32 /mi
2nd Half
Distance13.11 mi
Time1:47:37
Pace8:13 /mi
📊Positive Split: 8.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:14:3923:307:3423:30
7:34
-
10K
6.21 mi11:37:5346:447:3123:14
7:29
-0:05
15K
9.32 mi12:01:151:10:067:3123:22
7:31
+0:02
20K
12.43 mi12:24:461:33:377:3223:31
7:34
+0:03
Half
13.11 mi12:29:561:38:477:325:10
7:34
0:00
25K
15.53 mi12:48:451:57:367:3418:49
7:46
+0:12
30K
18.64 mi13:13:442:22:357:3924:59
8:02
+0:16
20M
20.00 mi13:24:532:33:447:4111:09
8:12
+0:10
21M
21.00 mi13:33:462:42:377:458:53
8:53
+0:41
35K
21.75 mi13:39:542:48:457:466:08
8:12
-0:41
23M
23.00 mi13:50:152:59:067:4710:21
8:16
+0:04
24M
24.00 mi13:58:343:07:257:498:19
8:19
+0:03
40K
24.85 mi14:06:153:15:067:517:41
8:59
+0:40
25.2M
25.20 mi14:09:263:18:177:523:11
9:14
+0:15
Finish
26.22 mi14:17:333:26:247:538:07
7:58
-1:16

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

7:29 /mi

Average Pace

7:53 /mi

Slowest Pace

9:14 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:38:47

48% of race

Time at Steady Pace

1:19:33

39% of race

Time at Slower Pace

28:04

14% of race

Average Pace: 7:52 /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 mi11:14:3923:307:3423:30
7:34
#12770
10K
6.21 mi11:37:5346:447:3123:14
7:29
#12312
15K
9.32 mi12:01:151:10:067:3123:22
7:31
#12171
20K
12.43 mi12:24:461:33:377:3223:31
7:34
#11926
Half
13.11 mi12:29:561:38:477:325:10
7:34
#11936
25K
15.53 mi12:48:451:57:367:3418:49
7:46
#11924
30K
18.64 mi13:13:442:22:357:3924:59
8:02
#11802
20M
20.00 mi13:24:532:33:447:4111:09
8:12
#11773
21M
21.00 mi13:33:462:42:377:458:53
8:53
#11839
35K
21.75 mi13:39:542:48:457:466:08
8:12
#11882
23M
23.00 mi13:50:152:59:067:4710:21
8:16
#11861
24M
24.00 mi13:58:343:07:257:498:19
8:19
#11913
40K
24.85 mi14:06:153:15:067:517:41
8:59
#12097
25.2M
25.20 mi14:09:263:18:177:523:11
9:14
#12096
Finish
26.22 mi14:17:333:26:247:538:07
7:58
#12103
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM55-59Seg. OverallSeg. MalesSeg. M55-59
5K3.11 mi3.11 mi127709538953811935(Top 42%)9035(Top 56%)9035(Top 548%)
10K6.21 mi3.10 mi12312+4589311+2279311+22711887(Top 42%)9100(Top 57%)9100(Top 552%)
15K9.32 mi3.11 mi12171+1419205+1069205+10611935(Top 42%)9035(Top 56%)9035(Top 548%)
20K12.43 mi3.11 mi11926+2459057+1489057+14811331(Top 40%)8657(Top 54%)8657(Top 525%)
Half13.11 mi0.68 mi11936-109057905712290(Top 43%)9145(Top 57%)9145(Top 555%)
25K15.53 mi2.42 mi11924+129009+489009+4812021(Top 42%)8859(Top 55%)8859(Top 538%)
30K18.64 mi3.11 mi11802+1228872+1378872+13711673(Top 41%)8511(Top 53%)8511(Top 516%)
20M20.00 mi1.36 mi11773+298834+388834+3811817(Top 42%)8431(Top 52%)8431(Top 512%)
21M21.00 mi1.00 mi11839-668820+148820+1412798(Top 45%)8739(Top 54%)8739(Top 530%)
35K21.75 mi0.75 mi11882-438821-18821-113565(Top 48%)9058(Top 56%)9058(Top 550%)
23M23.00 mi1.25 mi11861+218765+568765+5611804(Top 42%)8141(Top 51%)8141(Top 494%)
24M24.00 mi1.00 mi11913-528760+58760+513335(Top 47%)8812(Top 55%)8812(Top 535%)
40K24.85 mi0.85 mi12097-1848809-498809-4916188(Top 57%)9992(Top 62%)9992(Top 606%)
25.2M25.20 mi0.35 mi12096+18792+178792+1713027(Top 46%)8472(Top 53%)8472(Top 514%)
Finish26.22 mi1.02 mi12103-78777+158777+1512627(Top 44%)8345(Top 52%)8345(Top 506%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 42%
×21stories
+97ft-345ft

Overall

11935

Males

9035

M55-59

9035

5K→10K

3.1 - 6.2 mi

Top 42%
×5stories
+79ft-138ft

Overall

11887

Males

9100

M55-59

9100

10K→15K

6.2 - 9.3 mi

Top 42%
×3stories
+67ft-78ft

Overall

11935

Males

9035

M55-59

9035

15K→20K

9.3 - 12.4 mi

Top 40%
×5stories
+106ft-86ft

Overall

11331

Males

8657

M55-59

8657

20K→Half

12.4 - 13.1 mi

Top 43%
×2stories
+19ft-37ft

Overall

12290

Males

9145

M55-59

9145

Half→25K

13.1 - 15.5 mi

Top 42%
×4stories
+66ft-88ft

Overall

12021

Males

8859

M55-59

8859

25K→30K

15.5 - 18.6 mi

Top 41%
×9stories
+181ft-148ft

Overall

11673

Males

8511

M55-59

8511

30K→20M

18.6 - 20.0 mi

Top 42%
×5stories
+64ft-50ft

Overall

11817

Males

8431

M55-59

8431

20M→21M

20.0 - 21.0 mi

Top 45%
×8stories
+106ft-24ft

Overall

12798

Males

8739

M55-59

8739

21M→35K

21.0 - 21.8 mi

Top 48%
×7stories
+17ft-86ft

Overall

13565

Males

9058

M55-59

9058

35K→23M

21.8 - 23.0 mi

Top 42%
×5stories
+23ft-63ft

Overall

11804

Males

8141

M55-59

8141

23M→24M

23.0 - 24.0 mi

Top 47%
×6stories
+12ft-82ft

Overall

13335

Males

8812

M55-59

8812

24M→40K

24.0 - 24.9 mi

Top 57%
×1story
+6ft-20ft

Overall

16188

Males

9992

M55-59

9992

40K→25.2M

24.9 - 25.2 mi

Top 46%
×1story
+13ft-16ft

Overall

13027

Males

8472

M55-59

8472

25.2M→Finish

25.2 - 26.2 mi

Top 44%
×2stories
+22ft-21ft

Overall

12627

Males

8345

M55-59

8345

Passing Analysis

Category:
Athletes Passed
2207
Passed By
1540
Net Change
+667
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#12770
5K → 10K568110+458#12770#12312
10K → 15K260119+141#12312#12171
15K → 20K31873+245#12171#11926
20K → Half3646-10#11926#11936
Half → 25K170158+12#11936#11924
25K → 30K282160+122#11924#11802
30K → 20M12293+29#11802#11773
20M → 21M86152-66#11773#11839
21M → 35K4285-43#11839#11882
35K → 23M123102+21#11882#11861
23M → 24M59111-52#11861#11913
24M → 40K34218-184#11913#12097
40K → 25.2M4039+1#12097#12096
25.2M → Finish6774-7#12096#12103
TOTALS22071540+667
📊

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