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BOSTON MARATHON 2025

Brian Chen

Bib: 32379•M

MA

0:00
0:00
/ mi
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Overall
#0 / 28404
Gender (Male)
#0 / 16105
Division (M18-39)
#0 / 5642
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
9:23/mi
29:10
↑ 97↓ 3451.5%
10K· 6.21 mi
9:26/mi
58:28
↑ 79↓ 1380.4%
15K· 9.32 mi
9:26/mi
1:27:45
↑ 67↓ 78
20K· 12.43 mi
9:26/mi
1:57:04
↑ 106↓ 860.1%
Half· 13.11 mi
10:54/mi
2:04:30
↑ 19↓ 370.5%
25K· 15.53 mi
10:54/mi
2:30:56
↑ 66↓ 880.2%
30K· 18.64 mi
10:54/mi
3:04:48
↑ 181↓ 1480.2%
20M
14:08/mi
3:24:00
↑ 64↓ 500.2%
21M
16:27/mi
3:40:27
↑ 106↓ 241.6%
35K· 21.75 mi
15:44/mi
3:52:13
↑ 17↓ 861.7%
23M
14:38/mi
4:10:32
↑ 23↓ 630.6%
24M
11:32/mi
4:22:04
↓ 821.3%
40K· 24.85 mi
14:45/mi
4:34:41
↓ 200.3%
25.2M
11:08/mi
4:38:31
↑ 13↓ 160.2%
Finish· 26.22 mi
11:08/mi
4:49:52
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:04:30
Pace9:30 /mi
2nd Half
Distance13.11 mi
Time2:45:22
Pace12:37 /mi
📊Positive Split: 32.8% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:55:2729:109:2329:10
9:23
-
10K
6.21 mi12:24:4558:289:2429:18
9:26
+0:03
15K
9.32 mi12:54:021:27:459:2529:18
9:26
0:00
20K
12.43 mi13:23:211:57:049:2529:19
9:26
0:00
Half
13.11 mi13:30:472:04:309:307:26
10:54
+1:28
25K
15.53 mi13:57:132:30:569:4326:26
10:54
0:00
30K
18.64 mi14:31:053:04:489:5533:52
10:54
0:00
20M
20.00 mi14:50:173:24:0010:1219:12
14:08
+3:14
21M
21.00 mi15:06:443:40:2710:3016:27
16:27
+2:19
35K
21.75 mi15:18:303:52:1310:4111:46
15:44
-0:43
23M
23.00 mi15:36:494:10:3210:5418:19
14:38
-1:06
24M
24.00 mi15:48:214:22:0410:5511:32
11:32
-3:06
40K
24.85 mi16:00:584:34:4111:0312:37
14:45
+3:13
25.2M
25.20 mi16:04:484:38:3111:033:50
11:08
-3:37
Finish
26.22 mi16:16:094:49:5211:0411:21
11:08
0:00

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

9:23 /mi

Average Pace

11:04 /mi

Slowest Pace

16:27 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:57:04

40% of race

Time at Steady Pace

1:34:27

33% of race

Time at Slower Pace

1:18:21

27% of race

Average Pace: 11:03 /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 mi11:55:2729:109:2329:10
9:23
#23875
10K
6.21 mi12:24:4558:289:2429:18
9:26
#23916
15K
9.32 mi12:54:021:27:459:2529:18
9:26
#23794
20K
12.43 mi13:23:211:57:049:2529:19
9:26
#23541
Half
13.11 mi13:30:472:04:309:307:26
10:54
#23730
25K
15.53 mi13:57:132:30:569:4326:26
10:54
#24016
30K
18.64 mi14:31:053:04:489:5533:52
10:54
#24005
20M
20.00 mi14:50:173:24:0010:1219:12
14:08
#24488
21M
21.00 mi15:06:443:40:2710:3016:27
16:27
#24853
35K
21.75 mi15:18:303:52:1310:4111:46
15:44
#25151
23M
23.00 mi15:36:494:10:3210:5418:19
14:38
#25380
24M
24.00 mi15:48:214:22:0410:5511:32
11:32
#25365
40K
24.85 mi16:00:584:34:4111:0312:37
14:45
#25540
25.2M
25.20 mi16:04:484:38:3111:033:50
11:08
#25482
Finish
26.22 mi16:16:094:49:5211:0411:21
11:08
#25505
Faster pace
Steady pace
Slower pace
Est.Checkpoint not recorded (estimated)
~Segment time uses estimated prior

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi23875141821418223548(Top 83%)14078(Top 87%)14078(Top 250%)
10K6.21 mi3.10 mi23916-4114211-2914211-2923912(Top 84%)14218(Top 88%)14218(Top 252%)
15K9.32 mi3.11 mi23794+12214162+4914162+4923548(Top 83%)14078(Top 87%)14078(Top 250%)
20K12.43 mi3.11 mi23541+25314051+11114051+11122702(Top 80%)13667(Top 85%)13667(Top 242%)
Half13.11 mi0.68 mi23730-18914130-7914130-7926383(Top 93%)15270(Top 95%)15270(Top 271%)
25K15.53 mi2.42 mi24016-28614242-11214242-11225056(Top 88%)14670(Top 91%)14670(Top 260%)
30K18.64 mi3.11 mi24005+1114212+3014212+3023827(Top 84%)13992(Top 87%)13992(Top 248%)
20M20.00 mi1.36 mi24488-48314419-20714419-20727382(Top 96%)15562(Top 97%)15562(Top 276%)
21M21.00 mi1.00 mi24853-36514562-14314562-14327991(Top 99%)15873(Top 99%)15873(Top 281%)
35K21.75 mi0.75 mi25151-29814684-12214684-12228193(Top 99%)15969(Top 99%)15969(Top 283%)
23M23.00 mi1.25 mi25380-22914770-8614770-8627721(Top 98%)15688(Top 97%)15688(Top 278%)
24M24.00 mi1.00 mi25365+1514763+714763+724953(Top 88%)14285(Top 89%)14285(Top 253%)
40K24.85 mi0.85 mi25540-17514824-6114824-6127653(Top 97%)15635(Top 97%)15635(Top 277%)
25.2M25.20 mi0.35 mi25482+5814798+2614798+2621052(Top 74%)12303(Top 76%)12303(Top 218%)
Finish26.22 mi1.02 mi25505-2314799-114799-125597(Top 90%)14576(Top 91%)14576(Top 258%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 83%
×21story building
+97ft-345ft

Overall

23548

Males

14078

M18-39

14078

5K→10K

3.1 - 6.2 mi

Top 84%
×5story building
+79ft-138ft

Overall

23912

Males

14218

M18-39

14218

10K→15K

6.2 - 9.3 mi

Top 83%
×3story building
+67ft-78ft

Overall

23548

Males

14078

M18-39

14078

15K→20K

9.3 - 12.4 mi

Top 80%
×5story building
+106ft-86ft

Overall

22702

Males

13667

M18-39

13667

20K→Half

12.4 - 13.1 mi

Top 93%
×2story building
+19ft-37ft

Overall

26383

Males

15270

M18-39

15270

Half→25K

13.1 - 15.5 mi

Top 88%
×4story building
+66ft-88ft

Overall

25056

Males

14670

M18-39

14670

25K→30K

15.5 - 18.6 mi

Top 84%
×9story building
+181ft-148ft

Overall

23827

Males

13992

M18-39

13992

30K→20M

18.6 - 20.0 mi

Top 96%
×5story building
+64ft-50ft

Overall

27382

Males

15562

M18-39

15562

20M→21M

20.0 - 21.0 mi

Top 99%
×8story building
+106ft-24ft

Overall

27991

Males

15873

M18-39

15873

21M→35K

21.0 - 21.8 mi

Top 99%
×7story building
+17ft-86ft

Overall

28193

Males

15969

M18-39

15969

35K→23M

21.8 - 23.0 mi

Top 98%
×5story building
+23ft-63ft

Overall

27721

Males

15688

M18-39

15688

23M→24M

23.0 - 24.0 mi

Top 88%
×6story building
+12ft-82ft

Overall

24953

Males

14285

M18-39

14285

24M→40K

24.0 - 24.9 mi

Top 97%
×1story
+6ft-20ft

Overall

27653

Males

15635

M18-39

15635

40K→25.2M

24.9 - 25.2 mi

Top 74%
×1story
+13ft-16ft

Overall

21052

Males

12303

M18-39

12303

25.2M→Finish

25.2 - 26.2 mi

Top 90%
×2story building
+22ft-21ft

Overall

25597

Males

14576

M18-39

14576

Passing Analysis

Category:
Athletes Passed
1081
Passed By
2711
Net Change
-1630
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#23875
5K → 10K222263-41#23875#23916
10K → 15K21795+122#23916#23794
15K → 20K28532+253#23794#23541
20K → Half0189-189#23541#23730
Half → 25K51337-286#23730#24016
25K → 30K157146+11#24016#24005
30K → 20M10493-483#24005#24488
20M → 21M8373-365#24488#24853
21M → 35K2300-298#24853#25151
35K → 23M2231-229#25151#25380
23M → 24M4126+15#25380#25365
24M → 40K2177-175#25365#25540
40K → 25.2M591+58#25540#25482
25.2M → Finish2548-23#25482#25505
TOTALS10812711-1630
📊

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