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BOSTON MARATHON 2025

Calvin Ma

Bib: 16700•M

CO

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Male)
#0 / 16105
Masters (Masters Men)
#0 / 10463
Division (M55-59)
#0 / 1648
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
7:54/mi
24:34
↑ 97↓ 3451.5%
10K· 6.21 mi
8:18/mi
50:22
↑ 79↓ 1380.4%
15K· 9.32 mi
8:28/mi
1:16:40
↑ 67↓ 78
20K· 12.43 mi
8:45/mi
1:43:50
↑ 106↓ 860.1%
Half· 13.11 mi
8:27/mi
1:49:36
↑ 19↓ 370.5%
25K· 15.53 mi
8:47/mi
2:10:54
↑ 66↓ 880.2%
30K· 18.64 mi
9:57/mi
2:41:49
↑ 181↓ 1480.2%
20M
9:28/mi
2:54:41
↑ 64↓ 500.2%
21M
10:25/mi
3:05:06
↑ 106↓ 241.6%
35K· 21.75 mi
9:04/mi
3:11:53
↑ 17↓ 861.7%
23M
9:37/mi
3:23:56
↑ 23↓ 630.6%
24M
9:20/mi
3:33:16
↓ 821.3%
40K· 24.85 mi
9:39/mi
3:41:31
↓ 200.3%
25.2M
11:36/mi
3:45:31
↑ 13↓ 160.2%
Finish· 26.22 mi
9:21/mi
3:55:03
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:49:36
Pace8:22 /mi
2nd Half
Distance13.11 mi
Time2:05:27
Pace9:34 /mi
📊Positive Split: 14.5% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:58:2224:347:5424:34
7:54
-
10K
6.21 mi11:24:1050:228:0625:48
8:18
+0:24
15K
9.32 mi11:50:281:16:408:1426:18
8:28
+0:10
20K
12.43 mi12:17:381:43:508:2127:10
8:45
+0:17
Half
13.11 mi12:23:241:49:368:225:46
8:27
-0:18
25K
15.53 mi12:44:422:10:548:2621:18
8:47
+0:20
30K
18.64 mi13:15:372:41:498:4130:55
9:57
+1:10
20M
20.00 mi13:28:292:54:418:4412:52
9:28
-0:29
21M
21.00 mi13:38:543:05:068:4910:25
10:25
+0:57
35K
21.75 mi13:45:413:11:538:496:47
9:04
-1:21
23M
23.00 mi13:57:443:23:568:5212:03
9:37
+0:33
24M
24.00 mi14:07:043:33:168:539:20
9:20
-0:17
40K
24.85 mi14:15:193:41:318:558:15
9:39
+0:19
25.2M
25.20 mi14:19:193:45:318:574:00
11:36
+1:57
Finish
26.22 mi14:28:513:55:038:589:32
9:21
-2:15

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

7:54 /mi

Average Pace

8:58 /mi

Slowest Pace

11:36 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:10:54

56% of race

Time at Steady Pace

58:49

25% of race

Time at Slower Pace

45:20

19% of race

Average Pace: 8:58 /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 mi10:58:2224:347:5424:34
7:54
#15759
10K
6.21 mi11:24:1050:228:0625:48
8:18
#17294
15K
9.32 mi11:50:281:16:408:1426:18
8:28
#17924
20K
12.43 mi12:17:381:43:508:2127:10
8:45
#18342
Half
13.11 mi12:23:241:49:368:225:46
8:27
#18370
25K
15.53 mi12:44:422:10:548:2621:18
8:47
#18453
30K
18.64 mi13:15:372:41:498:4130:55
9:57
#19228
20M
20.00 mi13:28:292:54:418:4412:52
9:28
#19194
21M
21.00 mi13:38:543:05:068:4910:25
10:25
#19254
35K
21.75 mi13:45:413:11:538:496:47
9:04
#19234
23M
23.00 mi13:57:443:23:568:5212:03
9:37
#19227
24M
24.00 mi14:07:043:33:168:539:20
9:20
#19224
40K
24.85 mi14:15:193:41:318:558:15
9:39
#19230
25.2M
25.20 mi14:19:193:45:318:574:00
11:36
#19289
Finish
26.22 mi14:28:513:55:038:589:32
9:21
#19344
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM55-59Seg. OverallSeg. MalesSeg. M55-59
5K3.11 mi3.11 mi15759107221072219116(Top 67%)12095(Top 75%)12095(Top 734%)
10K6.21 mi3.10 mi17294-153511342-62011342-62018574(Top 65%)11883(Top 74%)11883(Top 721%)
15K9.32 mi3.11 mi17924-63011592-25011592-25019116(Top 67%)12095(Top 75%)12095(Top 734%)
20K12.43 mi3.11 mi18342-41811755-16311755-16319646(Top 69%)12302(Top 76%)12302(Top 746%)
Half13.11 mi0.68 mi18370-2811767-1211767-1218876(Top 66%)12001(Top 75%)12001(Top 728%)
25K15.53 mi2.42 mi18453-8311792-2511792-2518837(Top 66%)11892(Top 74%)11892(Top 722%)
30K18.64 mi3.11 mi19228-77512084-29212084-29221451(Top 76%)12913(Top 80%)12913(Top 784%)
20M20.00 mi1.36 mi19194+3412051+3312051+3319026(Top 67%)11706(Top 73%)11706(Top 710%)
21M21.00 mi1.00 mi19254-6012053-212053-219736(Top 69%)11923(Top 74%)11923(Top 723%)
35K21.75 mi0.75 mi19234+2012027+2612027+2618548(Top 65%)11279(Top 70%)11279(Top 684%)
23M23.00 mi1.25 mi19227+711995+3211995+3219163(Top 67%)11519(Top 72%)11519(Top 699%)
24M24.00 mi1.00 mi19224+311972+2311972+2318954(Top 67%)11390(Top 71%)11390(Top 691%)
40K24.85 mi0.85 mi19230-611950+2211950+2219262(Top 68%)11448(Top 71%)11448(Top 695%)
25.2M25.20 mi0.35 mi19289-5911966-1611966-1622265(Top 78%)12915(Top 80%)12915(Top 784%)
Finish26.22 mi1.02 mi19344-55119661196620604(Top 73%)12105(Top 75%)12105(Top 735%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 67%
×21story building
+97ft-345ft

Overall

19116

Males

12095

M55-59

12095

5K→10K

3.1 - 6.2 mi

Top 65%
×5story building
+79ft-138ft

Overall

18574

Males

11883

M55-59

11883

10K→15K

6.2 - 9.3 mi

Top 67%
×3story building
+67ft-78ft

Overall

19116

Males

12095

M55-59

12095

15K→20K

9.3 - 12.4 mi

Top 69%
×5story building
+106ft-86ft

Overall

19646

Males

12302

M55-59

12302

20K→Half

12.4 - 13.1 mi

Top 66%
×2story building
+19ft-37ft

Overall

18876

Males

12001

M55-59

12001

Half→25K

13.1 - 15.5 mi

Top 66%
×4story building
+66ft-88ft

Overall

18837

Males

11892

M55-59

11892

25K→30K

15.5 - 18.6 mi

Top 76%
×9story building
+181ft-148ft

Overall

21451

Males

12913

M55-59

12913

30K→20M

18.6 - 20.0 mi

Top 67%
×5story building
+64ft-50ft

Overall

19026

Males

11706

M55-59

11706

20M→21M

20.0 - 21.0 mi

Top 69%
×8story building
+106ft-24ft

Overall

19736

Males

11923

M55-59

11923

21M→35K

21.0 - 21.8 mi

Top 65%
×7story building
+17ft-86ft

Overall

18548

Males

11279

M55-59

11279

35K→23M

21.8 - 23.0 mi

Top 67%
×5story building
+23ft-63ft

Overall

19163

Males

11519

M55-59

11519

23M→24M

23.0 - 24.0 mi

Top 67%
×6story building
+12ft-82ft

Overall

18954

Males

11390

M55-59

11390

24M→40K

24.0 - 24.9 mi

Top 68%
×1story
+6ft-20ft

Overall

19262

Males

11448

M55-59

11448

40K→25.2M

24.9 - 25.2 mi

Top 78%
×1story
+13ft-16ft

Overall

22265

Males

12915

M55-59

12915

25.2M→Finish

25.2 - 26.2 mi

Top 73%
×2story building
+22ft-21ft

Overall

20604

Males

12105

M55-59

12105

Passing Analysis

Category:
Athletes Passed
965
Passed By
4550
Net Change
-3585
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#15759
5K → 10K361571-1535#15759#17294
10K → 15K54684-630#17294#17924
15K → 20K87505-418#17924#18342
20K → Half2957-28#18342#18370
Half → 25K144227-83#18370#18453
25K → 30K67842-775#18453#19228
30K → 20M12591+34#19228#19194
20M → 21M78138-60#19194#19254
21M → 35K6242+20#19254#19234
35K → 23M9487+7#19234#19227
23M → 24M7168+3#19227#19224
24M → 40K6268-6#19224#19230
40K → 25.2M1574-59#19230#19289
25.2M → Finish4196-55#19289#19344
TOTALS9654550-3585
📊

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