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BOSTON MARATHON 2025

Chi Leung Choi

Bib: 19531•M

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 46%
Division (M55-59)
#0 / 1648
Top 31%
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
7:33/mi
23:27
↑ 97↓ 3451.5%
10K· 6.21 mi
7:25/mi
46:31
↑ 79↓ 1380.4%
15K· 9.32 mi
7:28/mi
1:09:44
↑ 67↓ 78
20K· 12.43 mi
7:34/mi
1:33:14
↑ 106↓ 860.1%
Half· 13.11 mi
7:33/mi
1:38:23
↑ 19↓ 370.5%
25K· 15.53 mi
7:46/mi
1:57:12
↑ 66↓ 880.2%
30K· 18.64 mi
8:15/mi
2:22:49
↑ 181↓ 1480.2%
20M
8:17/mi
2:34:04
↑ 64↓ 500.2%
21M
8:50/mi
2:42:54
↑ 106↓ 241.6%
35K· 21.75 mi
8:11/mi
2:49:01
↑ 17↓ 861.7%
23M
8:34/mi
2:59:45
↑ 23↓ 630.6%
24M
8:25/mi
3:08:10
↓ 821.3%
40K· 24.85 mi
8:25/mi
3:15:22
↓ 200.3%
25.2M
9:31/mi
3:18:39
↑ 13↓ 160.2%
Finish· 26.22 mi
8:10/mi
3:26:58
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:38:23
Pace7:30 /mi
2nd Half
Distance13.11 mi
Time1:48:35
Pace8:17 /mi
📊Positive Split: 10.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:14:3523:277:3323:27
7:33
-
10K
6.21 mi11:37:3946:317:2923:04
7:25
-0:08
15K
9.32 mi12:00:521:09:447:2923:13
7:28
+0:03
20K
12.43 mi12:24:221:33:147:3023:30
7:34
+0:06
Half
13.11 mi12:29:311:38:237:305:09
7:33
-0:01
25K
15.53 mi12:48:201:57:127:3318:49
7:46
+0:13
30K
18.64 mi13:13:572:22:497:4025:37
8:15
+0:29
20M
20.00 mi13:25:122:34:047:4211:15
8:17
+0:02
21M
21.00 mi13:34:022:42:547:458:50
8:50
+0:33
35K
21.75 mi13:40:092:49:017:466:07
8:11
-0:39
23M
23.00 mi13:50:532:59:457:4910:44
8:34
+0:23
24M
24.00 mi13:59:183:08:107:508:25
8:25
-0:09
40K
24.85 mi14:06:303:15:227:527:12
8:25
0:00
25.2M
25.20 mi14:09:473:18:397:533:17
9:31
+1:06
Finish
26.22 mi14:18:063:26:587:548:19
8:10
-1:21

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

7:25 /mi

Average Pace

7:54 /mi

Slowest Pace

9:31 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:57:12

57% of race

Time at Steady Pace

1:06:55

32% of race

Time at Slower Pace

22:51

11% of race

Average Pace: 7:54 /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 mi11:14:3523:277:3323:27
7:33
#12645
10K
6.21 mi11:37:3946:317:2923:04
7:25
#12009
15K
9.32 mi12:00:521:09:447:2923:13
7:28
#11826
20K
12.43 mi12:24:221:33:147:3023:30
7:34
#11646
Half
13.11 mi12:29:311:38:237:305:09
7:33
#11679
25K
15.53 mi12:48:201:57:127:3318:49
7:46
#11710
30K
18.64 mi13:13:572:22:497:4025:37
8:15
#11917
20M
20.00 mi13:25:122:34:047:4211:15
8:17
#11948
21M
21.00 mi13:34:022:42:547:458:50
8:50
#11938
35K
21.75 mi13:40:092:49:017:466:07
8:11
#11995
23M
23.00 mi13:50:532:59:457:4910:44
8:34
#12082
24M
24.00 mi13:59:183:08:107:508:25
8:25
#12169
40K
24.85 mi14:06:303:15:227:527:12
8:25
#12183
25.2M
25.20 mi14:09:473:18:397:533:17
9:31
#12222
Finish
26.22 mi14:18:063:26:587:548:19
8:10
#12265
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM55-59Seg. OverallSeg. MalesSeg. M55-59
5K3.11 mi3.11 mi126459479947911522(Top 41%)8843(Top 55%)8843(Top 537%)
10K6.21 mi3.10 mi12009+6369158+3219158+32111397(Top 40%)8854(Top 55%)8854(Top 537%)
15K9.32 mi3.11 mi11826+1839064+949064+9411522(Top 41%)8843(Top 55%)8843(Top 537%)
20K12.43 mi3.11 mi11646+1808928+1368928+13611273(Top 40%)8632(Top 54%)8632(Top 524%)
Half13.11 mi0.68 mi11679-338944-168944-1612086(Top 43%)9058(Top 56%)9058(Top 550%)
25K15.53 mi2.42 mi11710-318919+258919+2512023(Top 42%)8861(Top 55%)8861(Top 538%)
30K18.64 mi3.11 mi11917-2078938-198938-1913133(Top 46%)9195(Top 57%)9195(Top 558%)
20M20.00 mi1.36 mi11948-318914+248914+2412326(Top 43%)8681(Top 54%)8681(Top 527%)
21M21.00 mi1.00 mi11938+108870+448870+4412482(Top 44%)8600(Top 53%)8600(Top 522%)
35K21.75 mi0.75 mi11995-578874-48874-413418(Top 47%)8994(Top 56%)8994(Top 546%)
23M23.00 mi1.25 mi12082-878877-38877-313729(Top 48%)9030(Top 56%)9030(Top 548%)
24M24.00 mi1.00 mi12169-878879-28879-213966(Top 49%)9116(Top 57%)9116(Top 553%)
40K24.85 mi0.85 mi12183-148851+288851+2812895(Top 45%)8474(Top 53%)8474(Top 514%)
25.2M25.20 mi0.35 mi12222-398858-78858-714627(Top 51%)9220(Top 57%)9220(Top 559%)
Finish26.22 mi1.02 mi12265-438845+138845+1313980(Top 49%)9000(Top 56%)9000(Top 546%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 41%
×21story building
+97ft-345ft

Overall

11522

Males

8843

M55-59

8843

5K→10K

3.1 - 6.2 mi

Top 40%
×5story building
+79ft-138ft

Overall

11397

Males

8854

M55-59

8854

10K→15K

6.2 - 9.3 mi

Top 41%
×3story building
+67ft-78ft

Overall

11522

Males

8843

M55-59

8843

15K→20K

9.3 - 12.4 mi

Top 40%
×5story building
+106ft-86ft

Overall

11273

Males

8632

M55-59

8632

20K→Half

12.4 - 13.1 mi

Top 43%
×2story building
+19ft-37ft

Overall

12086

Males

9058

M55-59

9058

Half→25K

13.1 - 15.5 mi

Top 42%
×4story building
+66ft-88ft

Overall

12023

Males

8861

M55-59

8861

25K→30K

15.5 - 18.6 mi

Top 46%
×9story building
+181ft-148ft

Overall

13133

Males

9195

M55-59

9195

30K→20M

18.6 - 20.0 mi

Top 43%
×5story building
+64ft-50ft

Overall

12326

Males

8681

M55-59

8681

20M→21M

20.0 - 21.0 mi

Top 44%
×8story building
+106ft-24ft

Overall

12482

Males

8600

M55-59

8600

21M→35K

21.0 - 21.8 mi

Top 47%
×7story building
+17ft-86ft

Overall

13418

Males

8994

M55-59

8994

35K→23M

21.8 - 23.0 mi

Top 48%
×5story building
+23ft-63ft

Overall

13729

Males

9030

M55-59

9030

23M→24M

23.0 - 24.0 mi

Top 49%
×6story building
+12ft-82ft

Overall

13966

Males

9116

M55-59

9116

24M→40K

24.0 - 24.9 mi

Top 45%
×1story
+6ft-20ft

Overall

12895

Males

8474

M55-59

8474

40K→25.2M

24.9 - 25.2 mi

Top 51%
×1story
+13ft-16ft

Overall

14627

Males

9220

M55-59

9220

25.2M→Finish

25.2 - 26.2 mi

Top 49%
×2story building
+22ft-21ft

Overall

13980

Males

9000

M55-59

9000

Passing Analysis

Category:
Athletes Passed
2156
Passed By
1776
Net Change
+380
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#12645
5K → 10K70569+636#12645#12009
10K → 15K27693+183#12009#11826
15K → 20K282102+180#11826#11646
20K → Half2255-33#11646#11679
Half → 25K148179-31#11679#11710
25K → 30K180387-207#11710#11917
30K → 20M105136-31#11917#11948
20M → 21M10898+10#11948#11938
21M → 35K45102-57#11938#11995
35K → 23M80167-87#11995#12082
23M → 24M55142-87#12082#12169
24M → 40K7084-14#12169#12183
40K → 25.2M2362-39#12183#12222
25.2M → Finish57100-43#12222#12265
TOTALS21561776+380
📊

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