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BOSTON MARATHON 2025

Hadley Chu

Bib: 17618•F

NY

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 43%
Gender (Female)
#0 / 12228
Top 27%
Division (F18-39)
#0 / 5469
Top 45%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
23:36
Rank: #13092
Start → 5K
23:36 | 7:36/mi
10K· 6.21 mi
47:44
Rank: #13776 (-684)
5K → 10K
24:08 | 7:46/mi
15K· 9.32 mi
1:12:12
Rank: #14168 (-392)
10K → 15K
24:28 | 7:53/mi
20K· 12.43 mi
1:36:44
Rank: #14116 (+52)
15K → 20K
24:32 | 7:54/mi
Half· 13.11 mi
1:42:03
Rank: #14120 (-4)
20K → Half
5:19 | 7:48/mi
25K· 15.53 mi
2:01:23
Rank: #13994 (+126)
Half → 25K
19:20 | 7:58/mi
30K· 18.64 mi
2:26:18
Rank: #13465 (+529)
25K → 30K
24:55 | 8:01/mi
20M
2:37:07
Rank: #13181 (+284)
30K → 20M
10:49 | 7:58/mi
21M
2:45:28
Rank: #12928 (+253)
20M → 21M
8:21 | 8:21/mi
35K· 21.75 mi
2:51:18
Rank: #12849 (+79)
21M → 35K
5:50 | 7:48/mi
23M
3:01:25
Rank: #12666 (+183)
35K → 23M
10:07 | 8:05/mi
24M
3:09:21
Rank: #12556 (+110)
23M → 24M
7:56 | 7:56/mi
40K· 24.85 mi
3:16:01
Rank: #12383 (+173)
24M → 40K
6:40 | 7:48/mi
25.2M
3:18:53
Rank: #12296 (+87)
40K → 25.2M
2:52 | 8:19/mi
Finish· 26.22 mi
3:26:33
Rank: #12144 (+152)
25.2M → Finish
7:40 | 7:31/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:42:03
Pace7:47 /mi
2nd Half
Distance13.11 mi
Time1:44:30
Pace7:58 /mi
📊Positive Split: 2.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:13:4323:367:3623:36
7:36
-
10K
6.21 mi11:37:5147:447:4124:08
7:46
+0:10
15K
9.32 mi12:02:191:12:127:4524:28
7:53
+0:07
20K
12.43 mi12:26:511:36:447:4724:32
7:54
+0:01
Half
13.11 mi12:32:101:42:037:475:19
7:48
-0:06
25K
15.53 mi12:51:302:01:237:4919:20
7:58
+0:10
30K
18.64 mi13:16:252:26:187:5124:55
8:01
+0:03
20M
20.00 mi13:27:142:37:077:5110:49
7:58
-0:03
21M
21.00 mi13:35:352:45:287:538:21
8:21
+0:23
35K
21.75 mi13:41:252:51:187:535:50
7:48
-0:33
23M
23.00 mi13:51:323:01:257:5310:07
8:05
+0:17
24M
24.00 mi13:59:283:09:217:537:56
7:56
-0:09
40K
24.85 mi14:06:083:16:017:536:40
7:48
-0:08
25.2M
25.20 mi14:09:003:18:537:542:52
8:19
+0:31
Finish
26.22 mi14:16:403:26:337:537:40
7:31
-0:48

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

7:31 /mi

Average Pace

7:53 /mi

Slowest Pace

8:21 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:15:20

95% of race

Time at Steady Pace

11:13

5% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:53 /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 mi11:13:4323:367:3623:36
7:36
#13092
10K
6.21 mi11:37:5147:447:4124:08
7:46
#13776
15K
9.32 mi12:02:191:12:127:4524:28
7:53
#14168
20K
12.43 mi12:26:511:36:447:4724:32
7:54
#14116
Half
13.11 mi12:32:101:42:037:475:19
7:48
#14120
25K
15.53 mi12:51:302:01:237:4919:20
7:58
#13994
30K
18.64 mi13:16:252:26:187:5124:55
8:01
#13465
20M
20.00 mi13:27:142:37:077:5110:49
7:58
#13181
21M
21.00 mi13:35:352:45:287:538:21
8:21
#12928
35K
21.75 mi13:41:252:51:187:535:50
7:48
#12849
23M
23.00 mi13:51:323:01:257:5310:07
8:05
#12666
24M
24.00 mi13:59:283:09:217:537:56
7:56
#12556
40K
24.85 mi14:06:083:16:017:536:40
7:48
#12383
25.2M
25.20 mi14:09:003:18:537:542:52
8:19
#12296
Finish
26.22 mi14:16:403:26:337:537:40
7:31
#12144
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi130923371337115043(Top 53%)4595(Top 38%)4595(Top 84%)
10K6.21 mi3.10 mi13776-6843812-4413812-44114525(Top 51%)4262(Top 35%)4262(Top 78%)
15K9.32 mi3.11 mi14168-3924069-2574069-25715043(Top 53%)4595(Top 38%)4595(Top 84%)
20K12.43 mi3.11 mi14116+524072-34072-314062(Top 50%)4122(Top 34%)4122(Top 75%)
Half13.11 mi0.68 mi14120-44073-14073-114211(Top 50%)4162(Top 34%)4162(Top 76%)
25K15.53 mi2.42 mi13994+1264041+324041+3213683(Top 48%)4043(Top 33%)4043(Top 74%)
30K18.64 mi3.11 mi13465+5293796+2453796+24511550(Top 41%)3065(Top 25%)3065(Top 56%)
20M20.00 mi1.36 mi13181+2843680+1163680+11610215(Top 36%)2552(Top 21%)2552(Top 47%)
21M21.00 mi1.00 mi12928+2533571+1093571+1099574(Top 34%)2420(Top 20%)2420(Top 44%)
35K21.75 mi0.75 mi12849+793543+283543+2810860(Top 38%)3043(Top 25%)3043(Top 56%)
23M23.00 mi1.25 mi12666+1833482+613482+6110645(Top 37%)3063(Top 25%)3063(Top 56%)
24M24.00 mi1.00 mi12556+1103449+333449+3310795(Top 38%)3194(Top 26%)3194(Top 58%)
40K24.85 mi0.85 mi12383+1733395+543395+548805(Top 31%)2375(Top 19%)2375(Top 43%)
25.2M25.20 mi0.35 mi12296+873364+313364+317816(Top 28%)2005(Top 16%)2005(Top 37%)
Finish26.22 mi1.02 mi12144+1523318+463318+469395(Top 33%)2723(Top 22%)2723(Top 50%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 53%
×21stories
+97ft-345ft

Overall

15043

Females

4595

F18-39

4595

5K→10K

3.1 - 6.2 mi

Top 51%
×5stories
+79ft-138ft

Overall

14525

Females

4262

F18-39

4262

10K→15K

6.2 - 9.3 mi

Top 53%
×3stories
+67ft-78ft

Overall

15043

Females

4595

F18-39

4595

15K→20K

9.3 - 12.4 mi

Top 50%
×5stories
+106ft-86ft

Overall

14062

Females

4122

F18-39

4122

20K→Half

12.4 - 13.1 mi

Top 50%
×2stories
+19ft-37ft

Overall

14211

Females

4162

F18-39

4162

Half→25K

13.1 - 15.5 mi

Top 48%
×4stories
+66ft-88ft

Overall

13683

Females

4043

F18-39

4043

25K→30K

15.5 - 18.6 mi

Top 41%
×9stories
+181ft-148ft

Overall

11550

Females

3065

F18-39

3065

30K→20M

18.6 - 20.0 mi

Top 36%
×5stories
+64ft-50ft

Overall

10215

Females

2552

F18-39

2552

20M→21M

20.0 - 21.0 mi

Top 34%
×8stories
+106ft-24ft

Overall

9574

Females

2420

F18-39

2420

21M→35K

21.0 - 21.8 mi

Top 38%
×7stories
+17ft-86ft

Overall

10860

Females

3043

F18-39

3043

35K→23M

21.8 - 23.0 mi

Top 37%
×5stories
+23ft-63ft

Overall

10645

Females

3063

F18-39

3063

23M→24M

23.0 - 24.0 mi

Top 38%
×6stories
+12ft-82ft

Overall

10795

Females

3194

F18-39

3194

24M→40K

24.0 - 24.9 mi

Top 31%
×1story
+6ft-20ft

Overall

8805

Females

2375

F18-39

2375

40K→25.2M

24.9 - 25.2 mi

Top 28%
×1story
+13ft-16ft

Overall

7816

Females

2005

F18-39

2005

25.2M→Finish

25.2 - 26.2 mi

Top 33%
×2stories
+22ft-21ft

Overall

9395

Females

2723

F18-39

2723

Passing Analysis

Category:
Athletes Passed
2636
Passed By
1688
Net Change
+948
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#13092
5K → 10K89773-684#13092#13776
10K → 15K84476-392#13776#14168
15K → 20K239187+52#14168#14116
20K → Half3135-4#14116#14120
Half → 25K22296+126#14120#13994
25K → 30K54920+529#13994#13465
30K → 20M29410+284#13465#13181
20M → 21M26411+253#13181#12928
21M → 35K9415+79#12928#12849
35K → 23M20623+183#12849#12666
23M → 24M13525+110#12666#12556
24M → 40K1774+173#12556#12383
40K → 25.2M881+87#12383#12296
25.2M → Finish16412+152#12296#12144
TOTALS26361688+948
📊

Passing Visuals

Category:

📈Position Graph

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🎨Heatmap Timeline

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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