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BOSTON MARATHON 2025

Jianzhao Li

Bib: 3360•M

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 10%
Gender (Male)
#0 / 16105
Top 17%
Division (M18-39)
#0 / 5642
Top 38%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
19:54
Rank: #3140
Start → 5K
19:54 | 6:24/mi
10K· 6.21 mi
39:56
Rank: #3241 (-101)
5K → 10K
20:02 | 6:27/mi
15K· 9.32 mi
59:49
Rank: #3124 (+117)
10K → 15K
19:53 | 6:24/mi
20K· 12.43 mi
1:20:14
Rank: #3203 (-79)
15K → 20K
20:25 | 6:34/mi
Half· 13.11 mi
1:24:40
Rank: #3224 (-21)
20K → Half
4:26 | 6:30/mi
25K· 15.53 mi
1:40:45
Rank: #3288 (-64)
Half → 25K
16:05 | 6:38/mi
30K· 18.64 mi
2:01:25
Rank: #3112 (+176)
25K → 30K
20:40 | 6:39/mi
20M
2:10:34
Rank: #3032 (+80)
30K → 20M
9:09 | 6:44/mi
21M
2:17:36
Rank: #2969 (+63)
20M → 21M
7:02 | 7:02/mi
35K· 21.75 mi
2:22:34
Rank: #2927 (+42)
21M → 35K
4:58 | 6:38/mi
23M
2:31:00
Rank: #2854 (+73)
35K → 23M
8:26 | 6:44/mi
24M
2:37:38
Rank: #2810 (+44)
23M → 24M
6:38 | 6:38/mi
40K· 24.85 mi
2:43:34
Rank: #2813 (-3)
24M → 40K
5:56 | 6:56/mi
25.2M
2:46:14
Rank: #2823 (-10)
40K → 25.2M
2:40 | 7:44/mi
Finish· 26.22 mi
2:53:16
Rank: #2859 (-36)
25.2M → Finish
7:02 | 6:54/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:24:40
Pace6:27 /mi
2nd Half
Distance13.11 mi
Time1:28:36
Pace6:46 /mi
📊Positive Split: 4.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:23:2819:546:2419:54
6:24
-
10K
6.21 mi10:43:3039:566:2620:02
6:27
+0:03
15K
9.32 mi11:03:2359:496:2519:53
6:24
-0:03
20K
12.43 mi11:23:481:20:146:2720:25
6:34
+0:10
Half
13.11 mi11:28:141:24:406:274:26
6:30
-0:04
25K
15.53 mi11:44:191:40:456:2916:05
6:38
+0:08
30K
18.64 mi12:04:592:01:256:3120:40
6:39
+0:01
20M
20.00 mi12:14:082:10:346:329:09
6:44
+0:05
21M
21.00 mi12:21:102:17:366:337:02
7:02
+0:18
35K
21.75 mi12:26:082:22:346:334:58
6:38
-0:24
23M
23.00 mi12:34:342:31:006:348:26
6:44
+0:06
24M
24.00 mi12:41:122:37:386:346:38
6:38
-0:06
40K
24.85 mi12:47:082:43:346:355:56
6:56
+0:18
25.2M
25.20 mi12:49:482:46:146:362:40
7:44
+0:48
Finish
26.22 mi12:56:502:53:166:377:02
6:54
-0:50

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

6:24 /mi

Average Pace

6:37 /mi

Slowest Pace

7:44 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

59:49

35% of race

Time at Steady Pace

1:30:47

52% of race

Time at Slower Pace

22:40

13% of race

Average Pace: 6:36 /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 mi10:23:2819:546:2419:54
6:24
#3140
10K
6.21 mi10:43:3039:566:2620:02
6:27
#3241
15K
9.32 mi11:03:2359:496:2519:53
6:24
#3124
20K
12.43 mi11:23:481:20:146:2720:25
6:34
#3203
Half
13.11 mi11:28:141:24:406:274:26
6:30
#3224
25K
15.53 mi11:44:191:40:456:2916:05
6:38
#3288
30K
18.64 mi12:04:592:01:256:3120:40
6:39
#3112
20M
20.00 mi12:14:082:10:346:329:09
6:44
#3032
21M
21.00 mi12:21:102:17:366:337:02
7:02
#2969
35K
21.75 mi12:26:082:22:346:334:58
6:38
#2927
23M
23.00 mi12:34:342:31:006:348:26
6:44
#2854
24M
24.00 mi12:41:122:37:386:346:38
6:38
#2810
40K
24.85 mi12:47:082:43:346:355:56
6:56
#2813
25.2M
25.20 mi12:49:482:46:146:362:40
7:44
#2823
Finish
26.22 mi12:56:502:53:166:377:02
6:54
#2859
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi3140298329832929(Top 10%)2793(Top 17%)2793(Top 50%)
10K6.21 mi3.10 mi3241-1013080-973080-973350(Top 12%)3181(Top 20%)3181(Top 56%)
15K9.32 mi3.11 mi3124+1172973+1072973+1072929(Top 10%)2793(Top 17%)2793(Top 50%)
20K12.43 mi3.11 mi3203-793050-773050-773519(Top 12%)3329(Top 21%)3329(Top 59%)
Half13.11 mi0.68 mi3224-213071-213071-213594(Top 13%)3394(Top 21%)3394(Top 60%)
25K15.53 mi2.42 mi3288-643126-553126-553657(Top 13%)3436(Top 21%)3436(Top 61%)
30K18.64 mi3.11 mi3112+1762959+1672959+1672643(Top 9%)2501(Top 16%)2501(Top 44%)
20M20.00 mi1.36 mi3032+802879+802879+802605(Top 9%)2447(Top 15%)2447(Top 43%)
21M21.00 mi1.00 mi2969+632817+622817+622386(Top 8%)2227(Top 14%)2227(Top 39%)
35K21.75 mi0.75 mi2927+422773+442773+443118(Top 11%)2860(Top 18%)2860(Top 51%)
23M23.00 mi1.25 mi2854+732706+672706+672403(Top 8%)2230(Top 14%)2230(Top 40%)
24M24.00 mi1.00 mi2810+442663+432663+432627(Top 9%)2410(Top 15%)2410(Top 43%)
40K24.85 mi0.85 mi2813-32664-12664-13523(Top 12%)3119(Top 19%)3119(Top 55%)
25.2M25.20 mi0.35 mi2823-102673-92673-94413(Top 16%)3691(Top 23%)3691(Top 65%)
Finish26.22 mi1.02 mi2859-362703-302703-305047(Top 18%)4135(Top 26%)4135(Top 73%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 10%
×21stories
+97ft-345ft

Overall

2929

Males

2793

M18-39

2793

5K→10K

3.1 - 6.2 mi

Top 12%
×5stories
+79ft-138ft

Overall

3350

Males

3181

M18-39

3181

10K→15K

6.2 - 9.3 mi

Top 10%
×3stories
+67ft-78ft

Overall

2929

Males

2793

M18-39

2793

15K→20K

9.3 - 12.4 mi

Top 12%
×5stories
+106ft-86ft

Overall

3519

Males

3329

M18-39

3329

20K→Half

12.4 - 13.1 mi

Top 13%
×2stories
+19ft-37ft

Overall

3594

Males

3394

M18-39

3394

Half→25K

13.1 - 15.5 mi

Top 13%
×4stories
+66ft-88ft

Overall

3657

Males

3436

M18-39

3436

25K→30K

15.5 - 18.6 mi

Top 9%
×9stories
+181ft-148ft

Overall

2643

Males

2501

M18-39

2501

30K→20M

18.6 - 20.0 mi

Top 9%
×5stories
+64ft-50ft

Overall

2605

Males

2447

M18-39

2447

20M→21M

20.0 - 21.0 mi

Top 8%
×8stories
+106ft-24ft

Overall

2386

Males

2227

M18-39

2227

21M→35K

21.0 - 21.8 mi

Top 11%
×7stories
+17ft-86ft

Overall

3118

Males

2860

M18-39

2860

35K→23M

21.8 - 23.0 mi

Top 8%
×5stories
+23ft-63ft

Overall

2403

Males

2230

M18-39

2230

23M→24M

23.0 - 24.0 mi

Top 9%
×6stories
+12ft-82ft

Overall

2627

Males

2410

M18-39

2410

24M→40K

24.0 - 24.9 mi

Top 12%
×1story
+6ft-20ft

Overall

3523

Males

3119

M18-39

3119

40K→25.2M

24.9 - 25.2 mi

Top 16%
×1story
+13ft-16ft

Overall

4413

Males

3691

M18-39

3691

25.2M→Finish

25.2 - 26.2 mi

Top 18%
×2stories
+22ft-21ft

Overall

5047

Males

4135

M18-39

4135

Passing Analysis

Category:
Athletes Passed
1022
Passed By
741
Net Change
+281
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#3140
5K → 10K93194-101#3140#3241
10K → 15K15033+117#3241#3124
15K → 20K64143-79#3124#3203
20K → Half627-21#3203#3224
Half → 25K53117-64#3224#3288
25K → 30K19822+176#3288#3112
30K → 20M10121+80#3112#3032
20M → 21M7714+63#3032#2969
21M → 35K5412+42#2969#2927
35K → 23M9421+73#2927#2854
23M → 24M5612+44#2854#2810
24M → 40K4144-3#2810#2813
40K → 25.2M1424-10#2813#2823
25.2M → Finish2157-36#2823#2859
TOTALS1022741+281
📊

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