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BOSTON MARATHON 2025

Beibei Yi

Bib: 31958•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
9:08/mi
28:24
↑ 97↓ 3451.5%
10K· 6.21 mi
8:56/mi
56:08
↑ 79↓ 1380.4%
15K· 9.32 mi
9:13/mi
1:24:46
↑ 67↓ 78
20K· 12.43 mi
9:50/mi
1:55:20
↑ 106↓ 860.1%
Half· 13.11 mi
9:24/mi
2:01:45
↑ 19↓ 370.5%
25K· 15.53 mi
10:46/mi
2:27:51
↑ 66↓ 880.2%
30K· 18.64 mi
11:50/mi
3:04:36
↑ 181↓ 1480.2%
20M
11:45/mi
3:20:34
↑ 64↓ 500.2%
21M
14:12/mi
3:34:46
↑ 106↓ 241.6%
35K· 21.75 mi
10:59/mi
3:42:59
↑ 17↓ 861.7%
23M
12:27/mi
3:58:34
↑ 23↓ 630.6%
24M
13:26/mi
4:12:00
↓ 821.3%
40K· 24.85 mi
13:39/mi
4:23:40
↓ 200.3%
25.2M
15:51/mi
4:29:08
↑ 13↓ 160.2%
Finish· 26.22 mi
11:00/mi
4:40:21
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:01:45
Pace9:17 /mi
2nd Half
Distance13.11 mi
Time2:38:36
Pace12:06 /mi
📊Positive Split: 30.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:48:4928:249:0828:24
9:08
-
10K
6.21 mi12:16:3356:089:0227:44
8:56
-0:12
15K
9.32 mi12:45:111:24:469:0628:38
9:13
+0:17
20K
12.43 mi13:15:451:55:209:1730:34
9:50
+0:37
Half
13.11 mi13:22:102:01:459:176:25
9:24
-0:26
25K
15.53 mi13:48:162:27:519:3126:06
10:46
+1:22
30K
18.64 mi14:25:013:04:369:5436:45
11:50
+1:04
20M
20.00 mi14:40:593:20:3410:0215:58
11:45
-0:05
21M
21.00 mi14:55:113:34:4610:1414:12
14:12
+2:27
35K
21.75 mi15:03:243:42:5910:158:13
10:59
-3:13
23M
23.00 mi15:18:593:58:3410:2215:35
12:27
+1:28
24M
24.00 mi15:32:254:12:0010:3013:26
13:26
+0:59
40K
24.85 mi15:44:054:23:4010:3611:40
13:39
+0:13
25.2M
25.20 mi15:49:334:29:0810:415:28
15:51
+2:12
Finish
26.22 mi16:00:464:40:2110:4211:13
11:00
-4:51

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

8:56 /mi

Average Pace

10:42 /mi

Slowest Pace

15:51 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:01:45

43% of race

Time at Steady Pace

1:38:15

35% of race

Time at Slower Pace

1:00:21

22% of race

Average Pace: 10:42 /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 mi11:48:4928:249:0828:24
9:08
#22995
10K
6.21 mi12:16:3356:089:0227:44
8:56
#22551
15K
9.32 mi12:45:111:24:469:0628:38
9:13
#22670
20K
12.43 mi13:15:451:55:209:1730:34
9:50
#23074
Half
13.11 mi13:22:102:01:459:176:25
9:24
#23087
25K
15.53 mi13:48:162:27:519:3126:06
10:46
#23464
30K
18.64 mi14:25:013:04:369:5436:45
11:50
#23975
20M
20.00 mi14:40:593:20:3410:0215:58
11:45
#24066
21M
21.00 mi14:55:113:34:4610:1414:12
14:12
#24295
35K
21.75 mi15:03:243:42:5910:158:13
10:59
#24281
23M
23.00 mi15:18:593:58:3410:2215:35
12:27
#24427
24M
24.00 mi15:32:254:12:0010:3013:26
13:26
#24609
40K
24.85 mi15:44:054:23:4010:3611:40
13:39
#24758
25.2M
25.20 mi15:49:334:29:0810:415:28
15:51
#24842
Finish
26.22 mi16:00:464:40:2110:4211:13
11:00
#24874
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi229959171917122898(Top 81%)9047(Top 74%)9047(Top 165%)
10K6.21 mi3.10 mi22551+4448917+2548917+25422057(Top 78%)8630(Top 71%)8630(Top 158%)
15K9.32 mi3.11 mi22670-1198947-308947-3022898(Top 81%)9047(Top 74%)9047(Top 165%)
20K12.43 mi3.11 mi23074-4049167-2209167-22023852(Top 84%)9632(Top 79%)9632(Top 176%)
Half13.11 mi0.68 mi23087-139174-79174-723247(Top 82%)9292(Top 76%)9292(Top 170%)
25K15.53 mi2.42 mi23464-3779394-2209394-22024830(Top 87%)10196(Top 83%)10196(Top 186%)
30K18.64 mi3.11 mi23975-5119714-3209714-32025354(Top 89%)10589(Top 87%)10589(Top 194%)
20M20.00 mi1.36 mi24066-919791-779791-7724905(Top 88%)10422(Top 85%)10422(Top 191%)
21M21.00 mi1.00 mi24295-2299930-1399930-13926431(Top 93%)11270(Top 92%)11270(Top 206%)
35K21.75 mi0.75 mi24281+149931-19931-124134(Top 85%)10137(Top 83%)10137(Top 185%)
23M23.00 mi1.25 mi24427-14610020-8910020-8925722(Top 91%)10964(Top 90%)10964(Top 200%)
24M24.00 mi1.00 mi24609-18210134-11410134-11427257(Top 96%)11785(Top 96%)11785(Top 215%)
40K24.85 mi0.85 mi24758-14910229-9510229-9526880(Top 95%)11587(Top 95%)11587(Top 212%)
25.2M25.20 mi0.35 mi24842-8410274-4510274-4527621(Top 97%)11942(Top 98%)11942(Top 218%)
Finish26.22 mi1.02 mi24874-3210297-2310297-2325363(Top 89%)10832(Top 89%)10832(Top 198%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 81%
×21story building
+97ft-345ft

Overall

22898

Females

9047

F18-39

9047

5K→10K

3.1 - 6.2 mi

Top 78%
×5story building
+79ft-138ft

Overall

22057

Females

8630

F18-39

8630

10K→15K

6.2 - 9.3 mi

Top 81%
×3story building
+67ft-78ft

Overall

22898

Females

9047

F18-39

9047

15K→20K

9.3 - 12.4 mi

Top 84%
×5story building
+106ft-86ft

Overall

23852

Females

9632

F18-39

9632

20K→Half

12.4 - 13.1 mi

Top 82%
×2story building
+19ft-37ft

Overall

23247

Females

9292

F18-39

9292

Half→25K

13.1 - 15.5 mi

Top 87%
×4story building
+66ft-88ft

Overall

24830

Females

10196

F18-39

10196

25K→30K

15.5 - 18.6 mi

Top 89%
×9story building
+181ft-148ft

Overall

25354

Females

10589

F18-39

10589

30K→20M

18.6 - 20.0 mi

Top 88%
×5story building
+64ft-50ft

Overall

24905

Females

10422

F18-39

10422

20M→21M

20.0 - 21.0 mi

Top 93%
×8story building
+106ft-24ft

Overall

26431

Females

11270

F18-39

11270

21M→35K

21.0 - 21.8 mi

Top 85%
×7story building
+17ft-86ft

Overall

24134

Females

10137

F18-39

10137

35K→23M

21.8 - 23.0 mi

Top 91%
×5story building
+23ft-63ft

Overall

25722

Females

10964

F18-39

10964

23M→24M

23.0 - 24.0 mi

Top 96%
×6story building
+12ft-82ft

Overall

27257

Females

11785

F18-39

11785

24M→40K

24.0 - 24.9 mi

Top 95%
×1story
+6ft-20ft

Overall

26880

Females

11587

F18-39

11587

40K→25.2M

24.9 - 25.2 mi

Top 97%
×1story
+13ft-16ft

Overall

27621

Females

11942

F18-39

11942

25.2M→Finish

25.2 - 26.2 mi

Top 89%
×2story building
+22ft-21ft

Overall

25363

Females

10832

F18-39

10832

Passing Analysis

Category:
Athletes Passed
1018
Passed By
2897
Net Change
-1879
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#22995
5K → 10K52076+444#22995#22551
10K → 15K141260-119#22551#22670
15K → 20K78482-404#22670#23074
20K → Half2740-13#23074#23087
Half → 25K41418-377#23087#23464
25K → 30K37548-511#23464#23975
30K → 20M51142-91#23975#24066
20M → 21M13242-229#24066#24295
21M → 35K4026+14#24295#24281
35K → 23M30176-146#24281#24427
23M → 24M11193-182#24427#24609
24M → 40K5154-149#24609#24758
40K → 25.2M387-84#24758#24842
25.2M → Finish2153-32#24842#24874
TOTALS10182897-1879
📊

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