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BOSTON MARATHON 2025

Bangchun Ou

Bib: 15471 M CN

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
Top 43%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
469 ft elev
5K· 3.11 mi
7:13/mi
22:24
↑ 97↓ 3451.5%
220 ft elev
10K· 6.21 mi
7:12/mi
44:46
↑ 79↓ 1380.4%
157 ft elev
15K· 9.32 mi
7:30/mi
1:08:03
↑ 67↓ 78
146 ft elev
20K· 12.43 mi
8:03/mi
1:33:03
↑ 106↓ 860.1%
165 ft elev
Half· 13.11 mi
7:42/mi
1:38:18
↑ 19↓ 370.5%
148 ft elev
25K· 15.53 mi
8:06/mi
1:57:57
↑ 66↓ 880.2%
127 ft elev
30K· 18.64 mi
8:40/mi
2:24:54
↑ 181↓ 1480.2%
138 ft elev
20M
9:13/mi
2:37:25
↑ 64↓ 500.2%
148 ft elev
21M
10:03/mi
2:47:28
↑ 106↓ 241.6%
227 ft elev
35K· 21.75 mi
8:19/mi
2:53:41
↑ 17↓ 861.7%
156 ft elev
23M
8:59/mi
3:04:56
↑ 23↓ 630.6%
116 ft elev
24M
8:22/mi
3:13:18
↓ 821.3%
34 ft elev
40K· 24.85 mi
9:14/mi
3:21:12
↓ 200.3%
20 ft elev
25.2M
10:03/mi
3:24:40
↑ 13↓ 160.2%
18 ft elev
Finish· 26.22 mi
9:27/mi
3:34:18
↑ 22↓ 21
17 ft elev
Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:38:18
Pace7:30 /mi
2nd Half
Distance13.11 mi
Time1:56:00
Pace8:51 /mi
📊Positive Split: 18.0% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:54:1222:247:1322:24
7:13
-
10K
6.21 mi11:16:3444:467:1222:22
7:12
-0:01
15K
9.32 mi11:39:511:08:037:1823:17
7:30
+0:18
20K
12.43 mi12:04:511:33:037:2925:00
8:03
+0:33
Half
13.11 mi12:10:061:38:187:305:15
7:42
-0:21
25K
15.53 mi12:29:451:57:577:3619:39
8:06
+0:24
30K
18.64 mi12:56:422:24:547:4626:57
8:40
+0:34
20M
20.00 mi13:09:132:37:257:5212:31
9:13
+0:33
21M
21.00 mi13:19:162:47:287:5810:03
10:03
+0:50
35K
21.75 mi13:25:292:53:417:596:13
8:19
-1:44
23M
23.00 mi13:36:443:04:568:0211:15
8:59
+0:40
24M
24.00 mi13:45:063:13:188:038:22
8:22
-0:37
40K
24.85 mi13:53:003:21:128:067:54
9:14
+0:52
25.2M
25.20 mi13:56:283:24:408:073:28
10:03
+0:49
Finish
26.22 mi14:06:063:34:188:119:38
9:27
-0:36

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

7:12 /mi

Average Pace

8:11 /mi

Slowest Pace

10:03 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:13:18

34% of race

Time at Steady Pace

1:26:11

40% of race

Time at Slower Pace

54:49

26% of race

Average Pace: 8:10 /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 mi10:54:1222:247:1322:24
7:13
#9544
10K
6.21 mi11:16:3444:467:1222:22
7:12
#9494
15K
9.32 mi11:39:511:08:037:1823:17
7:30
#10210
20K
12.43 mi12:04:511:33:037:2925:00
8:03
#11534
Half
13.11 mi12:10:061:38:187:305:15
7:42
#11621
25K
15.53 mi12:29:451:57:577:3619:39
8:06
#12111
30K
18.64 mi12:56:422:24:547:4626:57
8:40
#12843
20M
20.00 mi13:09:132:37:257:5212:31
9:13
#13299
21M
21.00 mi13:19:162:47:287:5810:03
10:03
#13648
35K
21.75 mi13:25:292:53:417:596:13
8:19
#13670
23M
23.00 mi13:36:443:04:568:0211:15
8:59
#13847
24M
24.00 mi13:45:063:13:188:038:22
8:22
#13834
40K
24.85 mi13:53:003:21:128:067:54
9:14
#14005
25.2M
25.20 mi13:56:283:24:408:073:28
10:03
#14063
Finish
26.22 mi14:06:063:34:188:119:38
9:27
#14369
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM55-59Seg. OverallSeg. MalesSeg. M55-59
5K3.11 mi3.11 mi95447921792111718(Top 41%)8943(Top 56%)8943(Top 543%)
10K6.21 mi3.10 mi9494+507898+237898+239479(Top 33%)7867(Top 49%)7867(Top 477%)
15K9.32 mi3.11 mi10210-7168247-3498247-34911718(Top 41%)8943(Top 56%)8943(Top 543%)
20K12.43 mi3.11 mi11534-13248869-6228869-62215242(Top 54%)10422(Top 65%)10422(Top 632%)
Half13.11 mi0.68 mi11621-878919-508919-5013324(Top 47%)9624(Top 60%)9624(Top 584%)
25K15.53 mi2.42 mi12111-4909105-1869105-18614660(Top 52%)10050(Top 62%)10050(Top 610%)
30K18.64 mi3.11 mi12843-7329362-2579362-25715841(Top 56%)10431(Top 65%)10431(Top 633%)
20M20.00 mi1.36 mi13299-4569516-1549516-15417808(Top 63%)11158(Top 69%)11158(Top 677%)
21M21.00 mi1.00 mi13648-3499631-1159631-11518469(Top 65%)11373(Top 71%)11373(Top 690%)
35K21.75 mi0.75 mi13670-229629+29629+214275(Top 50%)9405(Top 58%)9405(Top 571%)
23M23.00 mi1.25 mi13847-1779666-379666-3716148(Top 57%)10137(Top 63%)10137(Top 615%)
24M24.00 mi1.00 mi13834+139626+409626+4013648(Top 48%)8974(Top 56%)8974(Top 545%)
40K24.85 mi0.85 mi14005-1719681-559681-5517513(Top 62%)10601(Top 66%)10601(Top 643%)
25.2M25.20 mi0.35 mi14063-589698-179698-1717204(Top 61%)10445(Top 65%)10445(Top 634%)
Finish26.22 mi1.02 mi14369-3069808-1109808-11020992(Top 74%)12280(Top 76%)12280(Top 745%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 41%
×21story building
+97ft-345ft

Overall

11718

Males

8943

M55-59

8943

5K→10K

3.1 - 6.2 mi

Top 33%
×5story building
+79ft-138ft

Overall

9479

Males

7867

M55-59

7867

10K→15K

6.2 - 9.3 mi

Top 41%
×3story building
+67ft-78ft

Overall

11718

Males

8943

M55-59

8943

15K→20K

9.3 - 12.4 mi

Top 54%
×5story building
+106ft-86ft

Overall

15242

Males

10422

M55-59

10422

20K→Half

12.4 - 13.1 mi

Top 47%
×2story building
+19ft-37ft

Overall

13324

Males

9624

M55-59

9624

Half→25K

13.1 - 15.5 mi

Top 52%
×4story building
+66ft-88ft

Overall

14660

Males

10050

M55-59

10050

25K→30K

15.5 - 18.6 mi

Top 56%
×9story building
+181ft-148ft

Overall

15841

Males

10431

M55-59

10431

30K→20M

18.6 - 20.0 mi

Top 63%
×5story building
+64ft-50ft

Overall

17808

Males

11158

M55-59

11158

20M→21M

20.0 - 21.0 mi

Top 65%
×8story building
+106ft-24ft

Overall

18469

Males

11373

M55-59

11373

21M→35K

21.0 - 21.8 mi

Top 50%
×7story building
+17ft-86ft

Overall

14275

Males

9405

M55-59

9405

35K→23M

21.8 - 23.0 mi

Top 57%
×5story building
+23ft-63ft

Overall

16148

Males

10137

M55-59

10137

23M→24M

23.0 - 24.0 mi

Top 48%
×6story building
+12ft-82ft

Overall

13648

Males

8974

M55-59

8974

24M→40K

24.0 - 24.9 mi

Top 62%
×1story
+6ft-20ft

Overall

17513

Males

10601

M55-59

10601

40K→25.2M

24.9 - 25.2 mi

Top 61%
×1story
+13ft-16ft

Overall

17204

Males

10445

M55-59

10445

25.2M→Finish

25.2 - 26.2 mi

Top 74%
×2story building
+22ft-21ft

Overall

20992

Males

12280

M55-59

12280

Passing Analysis

Category:
Athletes Passed
870
Passed By
5692
Net Change
-4825
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#9544
5K → 10K260210+50#9544#9494
10K → 15K44758-716#9494#10210
15K → 20K261349-1324#10210#11534
20K → Half1198-87#11534#11621
Half → 25K61551-490#11621#12111
25K → 30K93825-732#12111#12843
30K → 20M43499-456#12843#13299
20M → 21M40389-349#13299#13648
21M → 35K5072-22#13648#13670
35K → 23M71248-177#13670#13847
23M → 24M9279+13#13847#13834
24M → 40K38209-171#13834#14005
40K → 25.2M2179-58#14005#14063
25.2M → Finish20326-306#14063#14369
TOTALS8705692-4825
📊

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