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BOSTON MARATHON 2025

Chengwen Liu

Bib: 11185•M

CA

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
7:44/mi
24:01
↑ 97↓ 3451.5%
10K· 6.21 mi
7:55/mi
48:37
↑ 79↓ 1380.4%
15K· 9.32 mi
7:58/mi
1:13:23
↑ 67↓ 78
20K· 12.43 mi
8:16/mi
1:39:03
↑ 106↓ 860.1%
Half· 13.11 mi
8:05/mi
1:44:34
↑ 19↓ 370.5%
25K· 15.53 mi
8:22/mi
2:04:52
↑ 66↓ 880.2%
30K· 18.64 mi
8:54/mi
2:32:30
↑ 181↓ 1480.2%
20M
9:13/mi
2:45:01
↑ 64↓ 500.2%
21M
9:51/mi
2:54:52
↑ 106↓ 241.6%
35K· 21.75 mi
8:55/mi
3:01:32
↑ 17↓ 861.7%
23M
9:17/mi
3:13:09
↑ 23↓ 630.6%
24M
9:16/mi
3:22:25
↓ 821.3%
40K· 24.85 mi
9:32/mi
3:30:34
↓ 200.3%
25.2M
11:27/mi
3:34:31
↑ 13↓ 160.2%
Finish· 26.22 mi
8:57/mi
3:43:38
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:44:34
Pace7:59 /mi
2nd Half
Distance13.11 mi
Time1:59:04
Pace9:05 /mi
📊Positive Split: 13.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:51:1224:017:4424:01
7:44
-
10K
6.21 mi11:15:4848:377:4924:36
7:55
+0:11
15K
9.32 mi11:40:341:13:237:5224:46
7:58
+0:03
20K
12.43 mi12:06:141:39:037:5825:40
8:16
+0:18
Half
13.11 mi12:11:451:44:347:595:31
8:05
-0:11
25K
15.53 mi12:32:032:04:528:0220:18
8:22
+0:17
30K
18.64 mi12:59:412:32:308:1127:38
8:54
+0:32
20M
20.00 mi13:12:122:45:018:1512:31
9:13
+0:19
21M
21.00 mi13:22:032:54:528:209:51
9:51
+0:38
35K
21.75 mi13:28:433:01:328:216:40
8:55
-0:56
23M
23.00 mi13:40:203:13:098:2411:37
9:17
+0:22
24M
24.00 mi13:49:363:22:258:269:16
9:16
-0:01
40K
24.85 mi13:57:453:30:348:288:09
9:32
+0:16
25.2M
25.20 mi14:01:423:34:318:313:57
11:27
+1:55
Finish
26.22 mi14:10:493:43:388:329:07
8:57
-2:30

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

7:44 /mi

Average Pace

8:32 /mi

Slowest Pace

11:27 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:04:52

56% of race

Time at Steady Pace

1:16:49

34% of race

Time at Slower Pace

21:57

10% of race

Average Pace: 8:32 /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 mi10:51:1224:017:4424:01
7:44
#14207
10K
6.21 mi11:15:4848:377:4924:36
7:55
#14983
15K
9.32 mi11:40:341:13:237:5224:46
7:58
#15268
20K
12.43 mi12:06:141:39:037:5825:40
8:16
#15710
Half
13.11 mi12:11:451:44:347:595:31
8:05
#15745
25K
15.53 mi12:32:032:04:528:0220:18
8:22
#15872
30K
18.64 mi12:59:412:32:308:1127:38
8:54
#16093
20M
20.00 mi13:12:122:45:018:1512:31
9:13
#16199
21M
21.00 mi13:22:032:54:528:209:51
9:51
#16232
35K
21.75 mi13:28:433:01:328:216:40
8:55
#16272
23M
23.00 mi13:40:203:13:098:2411:37
9:17
#16324
24M
24.00 mi13:49:363:22:258:269:16
9:16
#16440
40K
24.85 mi13:57:453:30:348:288:09
9:32
#16556
25.2M
25.20 mi14:01:423:34:318:313:57
11:27
#16694
Finish
26.22 mi14:10:493:43:388:329:07
8:57
#16780
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM45-49Seg. OverallSeg. MalesSeg. M45-49
5K3.11 mi3.11 mi14207101291012915817(Top 56%)10722(Top 67%)10722(Top 449%)
10K6.21 mi3.10 mi14983-77610402-27310402-27315795(Top 56%)10739(Top 67%)10739(Top 450%)
15K9.32 mi3.11 mi15268-28510506-10410506-10415817(Top 56%)10722(Top 67%)10722(Top 449%)
20K12.43 mi3.11 mi15710-44210676-17010676-17016690(Top 59%)11044(Top 69%)11044(Top 463%)
Half13.11 mi0.68 mi15745-3510689-1310689-1316505(Top 58%)10984(Top 68%)10984(Top 460%)
25K15.53 mi2.42 mi15872-12710730-4110730-4116370(Top 58%)10809(Top 67%)10809(Top 453%)
30K18.64 mi3.11 mi16093-22110765-3510765-3517107(Top 60%)10978(Top 68%)10978(Top 460%)
20M20.00 mi1.36 mi16199-10610771-610771-617810(Top 63%)11160(Top 69%)11160(Top 468%)
21M21.00 mi1.00 mi16232-3310760+1110760+1117671(Top 62%)10996(Top 68%)10996(Top 461%)
35K21.75 mi0.75 mi16272-4010751+910751+917780(Top 63%)10952(Top 68%)10952(Top 459%)
23M23.00 mi1.25 mi16324-52107511075117669(Top 62%)10798(Top 67%)10798(Top 453%)
24M24.00 mi1.00 mi16440-11610764-1310764-1318637(Top 66%)11227(Top 70%)11227(Top 471%)
40K24.85 mi0.85 mi16556-11610792-2810792-2818823(Top 66%)11232(Top 70%)11232(Top 471%)
25.2M25.20 mi0.35 mi16694-13810827-3510827-3521889(Top 77%)12720(Top 79%)12720(Top 533%)
Finish26.22 mi1.02 mi16780-8610840-1310840-1318747(Top 66%)11237(Top 70%)11237(Top 471%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 56%
×21story building
+97ft-345ft

Overall

15817

Males

10722

M45-49

10722

5K→10K

3.1 - 6.2 mi

Top 56%
×5story building
+79ft-138ft

Overall

15795

Males

10739

M45-49

10739

10K→15K

6.2 - 9.3 mi

Top 56%
×3story building
+67ft-78ft

Overall

15817

Males

10722

M45-49

10722

15K→20K

9.3 - 12.4 mi

Top 59%
×5story building
+106ft-86ft

Overall

16690

Males

11044

M45-49

11044

20K→Half

12.4 - 13.1 mi

Top 58%
×2story building
+19ft-37ft

Overall

16505

Males

10984

M45-49

10984

Half→25K

13.1 - 15.5 mi

Top 58%
×4story building
+66ft-88ft

Overall

16370

Males

10809

M45-49

10809

25K→30K

15.5 - 18.6 mi

Top 60%
×9story building
+181ft-148ft

Overall

17107

Males

10978

M45-49

10978

30K→20M

18.6 - 20.0 mi

Top 63%
×5story building
+64ft-50ft

Overall

17810

Males

11160

M45-49

11160

20M→21M

20.0 - 21.0 mi

Top 62%
×8story building
+106ft-24ft

Overall

17671

Males

10996

M45-49

10996

21M→35K

21.0 - 21.8 mi

Top 63%
×7story building
+17ft-86ft

Overall

17780

Males

10952

M45-49

10952

35K→23M

21.8 - 23.0 mi

Top 62%
×5story building
+23ft-63ft

Overall

17669

Males

10798

M45-49

10798

23M→24M

23.0 - 24.0 mi

Top 66%
×6story building
+12ft-82ft

Overall

18637

Males

11227

M45-49

11227

24M→40K

24.0 - 24.9 mi

Top 66%
×1story
+6ft-20ft

Overall

18823

Males

11232

M45-49

11232

40K→25.2M

24.9 - 25.2 mi

Top 77%
×1story
+13ft-16ft

Overall

21889

Males

12720

M45-49

12720

25.2M→Finish

25.2 - 26.2 mi

Top 66%
×2story building
+22ft-21ft

Overall

18747

Males

11237

M45-49

11237

Passing Analysis

Category:
Athletes Passed
1117
Passed By
3690
Net Change
-2573
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#14207
5K → 10K93869-776#14207#14983
10K → 15K129414-285#14983#15268
15K → 20K106548-442#15268#15710
20K → Half2055-35#15710#15745
Half → 25K139266-127#15745#15872
25K → 30K157378-221#15872#16093
30K → 20M83189-106#16093#16199
20M → 21M91124-33#16199#16232
21M → 35K5595-40#16232#16272
35K → 23M93145-52#16272#16324
23M → 24M55171-116#16324#16440
24M → 40K41157-116#16440#16556
40K → 25.2M7145-138#16556#16694
25.2M → Finish48134-86#16694#16780
TOTALS11173690-2573
📊

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