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BOSTON MARATHON 2025

Sihui Cai

Bib: 24248•M

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Male)
#0 / 16105
Masters (Masters Men)
#0 / 10463
Division (M65-69)
#0 / 639
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
28:43
Rank: #23365
Start → 5K
28:43 | 9:15/mi
10K· 6.21 mi
57:48
Rank: #23570 (-205)
5K → 10K
29:05 | 9:22/mi
15K· 9.32 mi
1:26:54
Rank: #23525 (+45)
10K → 15K
29:06 | 9:22/mi
20K· 12.43 mi
1:57:31
Rank: #23629 (-104)
15K → 20K
30:37 | 9:51/mi
Half· 13.11 mi
2:04:01
Rank: #23629
20K → Half
6:30 | 9:32/mi
25K· 15.53 mi
2:28:48
Rank: #23636 (-7)
Half → 25K
24:47 | 10:13/mi
30K· 18.64 mi
3:05:59
Rank: #24178 (-542)
25K → 30K
37:11 | 11:58/mi
20M
3:22:25
Rank: #24303 (-125)
30K → 20M
16:26 | 12:06/mi
21M
3:36:00
Rank: #24424 (-121)
20M → 21M
13:35 | 13:35/mi
35K· 21.75 mi
3:45:13
Rank: #24531 (-107)
21M → 35K
9:13 | 12:19/mi
23M
4:00:04
Rank: #24571 (-40)
35K → 23M
14:51 | 11:52/mi
24M
4:11:14
Rank: #24566 (+5)
23M → 24M
11:10 | 11:10/mi
40K· 24.85 mi
4:21:01
Rank: #24541 (+25)
24M → 40K
9:47 | 11:27/mi
25.2M
4:25:41
Rank: #24565 (-24)
40K → 25.2M
4:40 | 13:32/mi
Finish· 26.22 mi
4:37:07
Rank: #24628 (-63)
25.2M → Finish
11:26 | 11:13/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:04:01
Pace9:28 /mi
2nd Half
Distance13.11 mi
Time2:33:06
Pace11:41 /mi
📊Positive Split: 23.5% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:29:5628:439:1528:43
9:15
-
10K
6.21 mi11:59:0157:489:1829:05
9:22
+0:07
15K
9.32 mi12:28:071:26:549:1929:06
9:22
0:00
20K
12.43 mi12:58:441:57:319:2730:37
9:51
+0:29
Half
13.11 mi13:05:142:04:019:286:30
9:32
-0:19
25K
15.53 mi13:30:012:28:489:3524:47
10:13
+0:41
30K
18.64 mi14:07:123:05:599:5937:11
11:58
+1:45
20M
20.00 mi14:23:383:22:2510:0716:26
12:06
+0:08
21M
21.00 mi14:37:133:36:0010:1713:35
13:35
+1:29
35K
21.75 mi14:46:263:45:1310:219:13
12:19
-1:16
23M
23.00 mi15:01:174:00:0410:2614:51
11:52
-0:27
24M
24.00 mi15:12:274:11:1410:2811:10
11:10
-0:42
40K
24.85 mi15:22:144:21:0110:309:47
11:27
+0:17
25.2M
25.20 mi15:26:544:25:4110:334:40
13:32
+2:05
Finish
26.22 mi15:38:204:37:0710:3511:26
11:13
-2:19

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

9:15 /mi

Average Pace

10:35 /mi

Slowest Pace

13:35 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:28:48

54% of race

Time at Steady Pace

47:14

17% of race

Time at Slower Pace

1:21:05

29% of race

Average Pace: 10:34 /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 mi11:29:5628:439:1528:43
9:15
#23365
10K
6.21 mi11:59:0157:489:1829:05
9:22
#23570
15K
9.32 mi12:28:071:26:549:1929:06
9:22
#23525
20K
12.43 mi12:58:441:57:319:2730:37
9:51
#23629
Half
13.11 mi13:05:142:04:019:286:30
9:32
#23629
25K
15.53 mi13:30:012:28:489:3524:47
10:13
#23636
30K
18.64 mi14:07:123:05:599:5937:11
11:58
#24178
20M
20.00 mi14:23:383:22:2510:0716:26
12:06
#24303
21M
21.00 mi14:37:133:36:0010:1713:35
13:35
#24424
35K
21.75 mi14:46:263:45:1310:219:13
12:19
#24531
23M
23.00 mi15:01:174:00:0410:2614:51
11:52
#24571
24M
24.00 mi15:12:274:11:1410:2811:10
11:10
#24566
40K
24.85 mi15:22:144:21:0110:309:47
11:27
#24541
25.2M
25.20 mi15:26:544:25:4110:334:40
13:32
#24565
Finish
26.22 mi15:38:204:37:0710:3511:26
11:13
#24628
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM65-69Seg. OverallSeg. MalesSeg. M65-69
5K3.11 mi3.11 mi23365139381393823384(Top 82%)14015(Top 87%)14015(Top 2193%)
10K6.21 mi3.10 mi23570-20514042-10414042-10423723(Top 84%)14132(Top 88%)14132(Top 2212%)
15K9.32 mi3.11 mi23525+4514034+814034+823384(Top 82%)14015(Top 87%)14015(Top 2193%)
20K12.43 mi3.11 mi23629-10414092-5814092-5823892(Top 84%)14186(Top 88%)14186(Top 2220%)
Half13.11 mi0.68 mi2362914089+314089+323637(Top 83%)14074(Top 87%)14074(Top 2203%)
25K15.53 mi2.42 mi23636-714075+1414075+1423769(Top 84%)14086(Top 87%)14086(Top 2204%)
30K18.64 mi3.11 mi24178-54214293-21814293-21825549(Top 90%)14782(Top 92%)14782(Top 2313%)
20M20.00 mi1.36 mi24303-12514326-3314326-3325391(Top 89%)14628(Top 91%)14628(Top 2289%)
21M21.00 mi1.00 mi24424-12114370-4414370-4425752(Top 91%)14761(Top 92%)14761(Top 2310%)
35K21.75 mi0.75 mi24531-10714407-3714407-3726267(Top 92%)14974(Top 93%)14974(Top 2343%)
23M23.00 mi1.25 mi24571-40144071440724890(Top 88%)14282(Top 89%)14282(Top 2235%)
24M24.00 mi1.00 mi24566+514393+1414393+1424323(Top 86%)13981(Top 87%)13981(Top 2188%)
40K24.85 mi0.85 mi24541+2514374+1914374+1924033(Top 85%)13793(Top 86%)13793(Top 2159%)
25.2M25.20 mi0.35 mi24565-2414381-714381-725716(Top 91%)14598(Top 91%)14598(Top 2285%)
Finish26.22 mi1.02 mi24628-6314397-1614397-1625736(Top 91%)14651(Top 91%)14651(Top 2293%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 82%
×21stories
+97ft-345ft

Overall

23384

Males

14015

M65-69

14015

5K→10K

3.1 - 6.2 mi

Top 84%
×5stories
+79ft-138ft

Overall

23723

Males

14132

M65-69

14132

10K→15K

6.2 - 9.3 mi

Top 82%
×3stories
+67ft-78ft

Overall

23384

Males

14015

M65-69

14015

15K→20K

9.3 - 12.4 mi

Top 84%
×5stories
+106ft-86ft

Overall

23892

Males

14186

M65-69

14186

20K→Half

12.4 - 13.1 mi

Top 83%
×2stories
+19ft-37ft

Overall

23637

Males

14074

M65-69

14074

Half→25K

13.1 - 15.5 mi

Top 84%
×4stories
+66ft-88ft

Overall

23769

Males

14086

M65-69

14086

25K→30K

15.5 - 18.6 mi

Top 90%
×9stories
+181ft-148ft

Overall

25549

Males

14782

M65-69

14782

30K→20M

18.6 - 20.0 mi

Top 89%
×5stories
+64ft-50ft

Overall

25391

Males

14628

M65-69

14628

20M→21M

20.0 - 21.0 mi

Top 91%
×8stories
+106ft-24ft

Overall

25752

Males

14761

M65-69

14761

21M→35K

21.0 - 21.8 mi

Top 92%
×7stories
+17ft-86ft

Overall

26267

Males

14974

M65-69

14974

35K→23M

21.8 - 23.0 mi

Top 88%
×5stories
+23ft-63ft

Overall

24890

Males

14282

M65-69

14282

23M→24M

23.0 - 24.0 mi

Top 86%
×6stories
+12ft-82ft

Overall

24323

Males

13981

M65-69

13981

24M→40K

24.0 - 24.9 mi

Top 85%
×1story
+6ft-20ft

Overall

24033

Males

13793

M65-69

13793

40K→25.2M

24.9 - 25.2 mi

Top 91%
×1story
+13ft-16ft

Overall

25716

Males

14598

M65-69

14598

25.2M→Finish

25.2 - 26.2 mi

Top 91%
×2stories
+22ft-21ft

Overall

25736

Males

14651

M65-69

14651

Passing Analysis

Category:
Athletes Passed
856
Passed By
2119
Net Change
-1263
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#23365
5K → 10K157362-205#23365#23570
10K → 15K194149+45#23570#23525
15K → 20K112216-104#23525#23629
20K → Half18180#23629#23629
Half → 25K118125-7#23629#23636
25K → 30K32574-542#23636#24178
30K → 20M39164-125#24178#24303
20M → 21M28149-121#24303#24424
21M → 35K5112-107#24424#24531
35K → 23M4181-40#24531#24571
23M → 24M4540+5#24571#24566
24M → 40K4722+25#24566#24541
40K → 25.2M630-24#24541#24565
25.2M → Finish1477-63#24565#24628
TOTALS8562119-1263
📊

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