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BOSTON MARATHON 2025

Feifei Cao

Bib: 19270•F

0:00
0:00
/ mi
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Overall
#0 / 28404
Gender (Female)
#0 / 12228
Division (F18-39)
#0 / 5469
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
8:15/mi
25:38
↑ 97↓ 3451.5%
10K· 6.21 mi
16:50/mi
1:17:57
↑ 79↓ 1380.4%
15K· 9.32 mi
15:17/mi
2:05:25
↑ 67↓ 78
20K· 12.43 mi
18:20/mi
3:02:21
↑ 106↓ 860.1%
Half· 13.11 mi
25:55/mi
3:20:02
↑ 19↓ 370.5%
25K· 15.53 mi
15:52/mi
3:58:30
↑ 66↓ 880.2%
30K· 18.64 mi
16:14/mi
4:48:56
↑ 181↓ 1480.2%
20M
15:45/mi
5:10:20
↑ 64↓ 500.2%
21M
15:56/mi
5:26:16
↑ 106↓ 241.6%
35K· 21.75 mi
11:42/mi
5:35:01
↑ 17↓ 861.7%
23M
16:51/mi
5:56:07
↑ 23↓ 630.6%
24M
12:58/mi
6:09:05
↓ 821.3%
40K· 24.85 mi
12:58/mi
6:20:10
↓ 200.3%
25.2M
12:43/mi
6:24:33
↑ 13↓ 160.2%
Finish· 26.22 mi
11:11/mi
6:35:57
↑ 22↓ 21

The Course

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Half Splits

1st Half· via Half
Distance13.11 mi
Time3:20:02
Pace15:16 /mi
2nd Half✓ Faster
Distance13.11 mi
Time3:15:55
Pace14:57 /mi
📊Negative Split: 2.1% faster second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:19:1525:388:1525:38
8:15
-
10K
6.21 mi12:11:341:17:5712:3352:19
16:50
+8:35
15K
9.32 mi12:59:022:05:2513:2747:28
15:17
-1:33
20K
12.43 mi13:55:583:02:2114:4056:56
18:20
+3:03
Half
13.11 mi14:13:393:20:0215:1617:41
25:55
+7:35
25K
15.53 mi14:52:073:58:3015:2138:28
15:52
-10:03
30K
18.64 mi15:42:334:48:5615:3050:26
16:14
+0:22
20M
20.00 mi16:03:575:10:2015:3121:24
15:45
-0:29
21M
21.00 mi16:19:535:26:1615:3215:56
15:56
+0:11
35K
21.75 mi16:28:385:35:0115:248:45
11:42
-4:14
23M
23.00 mi16:49:445:56:0715:2921:06
16:51
+5:09
24M
24.00 mi17:02:426:09:0515:2312:58
12:58
-3:53
40K
24.85 mi17:13:476:20:1015:1811:05
12:58
0:00
25.2M
25.20 mi17:18:106:24:3315:164:23
12:43
-0:15
Finish
26.22 mi17:29:346:35:5715:0711:24
11:11
-1:32

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

8:15 /mi

Average Pace

15:07 /mi

Slowest Pace

25:55 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:14:13

19% of race

Time at Steady Pace

4:07:07

62% of race

Time at Slower Pace

1:14:37

19% of race

Average Pace: 15:06 /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 mi11:19:1525:388:1525:38
8:15
#18410
10K
6.21 mi12:11:341:17:5712:3352:19
16:50
#28302
15K
9.32 mi12:59:022:05:2513:2747:28
15:17
#28373
20K
12.43 mi13:55:583:02:2114:4056:56
18:20
#28397
Half
13.11 mi14:13:393:20:0215:1617:41
25:55
#28402
25K
15.53 mi14:52:073:58:3015:2138:28
15:52
#28400
30K
18.64 mi15:42:334:48:5615:3050:26
16:14
#28400
20M
20.00 mi16:03:575:10:2015:3121:24
15:45
#28401
21M
21.00 mi16:19:535:26:1615:3215:56
15:56
#28401
35K
21.75 mi16:28:385:35:0115:248:45
11:42
#28399
23M
23.00 mi16:49:445:56:0715:2921:06
16:51
#28399
24M
24.00 mi17:02:426:09:0515:2312:58
12:58
#28398
40K
24.85 mi17:13:476:20:1015:1811:05
12:58
#28394
25.2M
25.20 mi17:18:106:24:3315:164:23
12:43
#28389
Finish
26.22 mi17:29:346:35:5715:0711:24
11:11
#28388
Faster pace
Steady pace
Slower pace
Est.Checkpoint not recorded (estimated)
~Segment time uses estimated prior

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi184106589658928394(Top 100%)12224(Top 100%)12224(Top 224%)
10K6.21 mi3.10 mi28302-989212165-557612165-557628404(Top 100%)12228(Top 100%)12228(Top 224%)
15K9.32 mi3.11 mi28373-7112211-4612211-4628394(Top 100%)12224(Top 100%)12224(Top 224%)
20K12.43 mi3.11 mi28397-2412225-1412225-1428401(Top 100%)12227(Top 100%)12227(Top 224%)
Half13.11 mi0.68 mi28402-512227-212227-228403(Top 100%)12228(Top 100%)12228(Top 224%)
25K15.53 mi2.42 mi28400+212226+112226+128336(Top 100%)12197(Top 100%)12197(Top 223%)
30K18.64 mi3.11 mi28400122261222628301(Top 100%)12187(Top 100%)12187(Top 223%)
20M20.00 mi1.36 mi28401-1122261222628108(Top 99%)12110(Top 99%)12110(Top 221%)
21M21.00 mi1.00 mi28401122261222627774(Top 98%)11943(Top 98%)11943(Top 218%)
35K21.75 mi0.75 mi28399+2122261222625394(Top 89%)10800(Top 88%)10800(Top 197%)
23M23.00 mi1.25 mi28399122261222628259(Top 99%)12183(Top 100%)12183(Top 223%)
24M24.00 mi1.00 mi28398+1122261222626814(Top 94%)11542(Top 94%)11542(Top 211%)
40K24.85 mi0.85 mi28394+412225+112225+126271(Top 92%)11278(Top 92%)11278(Top 206%)
25.2M25.20 mi0.35 mi28389+512222+312222+324554(Top 86%)10462(Top 86%)10462(Top 191%)
Finish26.22 mi1.02 mi28388+1122221222225675(Top 90%)10992(Top 90%)10992(Top 201%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 100%
×21story building
+97ft-345ft

Overall

28394

Females

12224

F18-39

12224

5K→10K

3.1 - 6.2 mi

Top 100%
×5story building
+79ft-138ft

Overall

28404

Females

12228

F18-39

12228

10K→15K

6.2 - 9.3 mi

Top 100%
×3story building
+67ft-78ft

Overall

28394

Females

12224

F18-39

12224

15K→20K

9.3 - 12.4 mi

Top 100%
×5story building
+106ft-86ft

Overall

28401

Females

12227

F18-39

12227

20K→Half

12.4 - 13.1 mi

Top 100%
×2story building
+19ft-37ft

Overall

28403

Females

12228

F18-39

12228

Half→25K

13.1 - 15.5 mi

Top 100%
×4story building
+66ft-88ft

Overall

28336

Females

12197

F18-39

12197

25K→30K

15.5 - 18.6 mi

Top 100%
×9story building
+181ft-148ft

Overall

28301

Females

12187

F18-39

12187

30K→20M

18.6 - 20.0 mi

Top 99%
×5story building
+64ft-50ft

Overall

28108

Females

12110

F18-39

12110

20M→21M

20.0 - 21.0 mi

Top 98%
×8story building
+106ft-24ft

Overall

27774

Females

11943

F18-39

11943

21M→35K

21.0 - 21.8 mi

Top 89%
×7story building
+17ft-86ft

Overall

25394

Females

10800

F18-39

10800

35K→23M

21.8 - 23.0 mi

Top 99%
×5story building
+23ft-63ft

Overall

28259

Females

12183

F18-39

12183

23M→24M

23.0 - 24.0 mi

Top 94%
×6story building
+12ft-82ft

Overall

26814

Females

11542

F18-39

11542

24M→40K

24.0 - 24.9 mi

Top 92%
×1story
+6ft-20ft

Overall

26271

Females

11278

F18-39

11278

40K→25.2M

24.9 - 25.2 mi

Top 86%
×1story
+13ft-16ft

Overall

24554

Females

10462

F18-39

10462

25.2M→Finish

25.2 - 26.2 mi

Top 90%
×2story building
+22ft-21ft

Overall

25675

Females

10992

F18-39

10992

Passing Analysis

Category:
Athletes Passed
17
Passed By
9995
Net Change
-9978
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#18410
5K → 10K09892-9892#18410#28302
10K → 15K172-71#28302#28373
15K → 20K125-24#28373#28397
20K → Half05-5#28397#28402
Half → 25K20+2#28402#28400
25K → 30K000#28400#28400
30K → 20M01-1#28400#28401
20M → 21M000#28401#28401
21M → 35K20+2#28401#28399
35K → 23M000#28399#28399
23M → 24M10+1#28399#28398
24M → 40K40+4#28398#28394
40K → 25.2M50+5#28394#28389
25.2M → Finish10+1#28389#28388
TOTALS179995-9978
📊

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