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BOSTON MARATHON 2024

Rongxi Cai

Bib: 23357•F

WA

0:00
0:00
/ mi
Masters
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Overall
#0 / 25550
Gender (Female)
#0 / 10924
Masters (Masters Women)
#0 / 6263
Division (F60-64)
#0 / 549
Race Day Weather
55°/45°F
scattered clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
30:19
Rank: #22440
Start → 5K
9:45/mi
30:19 split
10K· 6.21 mi
1:00:37
Rank: #22204 (+236)
5K → 10K
9:45/mi
30:18 split
15K· 9.32 mi
1:32:17
Rank: #22258 (-54)
10K → 15K
10:12/mi
31:40 split
20K· 12.43 mi
2:04:31
Rank: #22000 (+258)
15K → 20K
10:22/mi
32:14 split
Half· 13.11 mi
2:11:19
Rank: #21973 (+27)
20K → Half
9:58/mi
6:48 split
25K· 15.53 mi
2:36:41
Rank: #21695 (+278)
Half → 25K
10:28/mi
25:22 split
30K· 18.64 mi
3:12:30
Rank: #21554 (+141)
25K → 30K
11:32/mi
35:49 split
20M
3:28:30
Rank: #21511 (+43)
30K → 20M
11:46/mi
16:00 split
21M
3:40:06
Rank: #21312 (+199)
20M → 21M
11:36/mi
11:36 split
35K· 21.75 mi
3:49:07
Rank: #21339 (-27)
21M → 35K
12:03/mi
9:01 split
23M
4:03:18
Rank: #21227 (+112)
35K → 23M
11:20/mi
14:11 split
24M
4:14:57
Rank: #21179 (+48)
23M → 24M
11:39/mi
11:39 split
40K· 24.85 mi
4:25:53
Rank: #21229 (-50)
24M → 40K
12:47/mi
10:56 split
25.2M
4:31:21
Rank: #21294 (-65)
40K → 25.2M
15:51/mi
5:28 split
Finish· 26.22 mi
4:47:15
Rank: #21686 (-392)
25.2M → Finish
15:36/mi
15:54 split

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:11:19
Pace10:01 /mi
2nd Half
Distance13.11 mi
Time2:35:56
Pace11:54 /mi
📊Positive Split: 18.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:30:0130:199:4530:19
9:45
-
10K
6.21 mi12:00:191:00:379:4530:18
9:45
0:00
15K
9.32 mi12:31:591:32:179:5431:40
10:12
+0:27
20K
12.43 mi13:04:132:04:3110:0132:14
10:22
+0:10
Half
13.11 mi13:11:012:11:1910:016:48
9:58
-0:24
25K
15.53 mi13:36:232:36:4110:0525:22
10:28
+0:30
30K
18.64 mi14:12:123:12:3010:2035:49
11:32
+1:04
20M
20.00 mi14:28:123:28:3010:2516:00
11:46
+0:14
21M
21.00 mi14:39:483:40:0610:2911:36
11:36
-0:10
35K
21.75 mi14:48:493:49:0710:329:01
12:03
+0:27
23M
23.00 mi15:03:004:03:1810:3514:11
11:20
-0:43
24M
24.00 mi15:14:394:14:5710:3711:39
11:39
+0:19
40K
24.85 mi15:25:354:25:5310:4210:56
12:47
+1:08
25.2M
25.20 mi15:31:034:31:2110:465:28
15:51
+3:04
Finish
26.22 mi15:46:574:47:1510:5815:54
15:36
-0:15

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

9:45 /mi

Average Pace

10:58 /mi

Slowest Pace

15:51 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:36:41

55% of race

Time at Steady Pace

1:38:16

34% of race

Time at Slower Pace

32:18

11% of race

Average Pace: 10:57 /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 mi11:30:0130:199:4530:19
9:45
#22440
10K
6.21 mi12:00:191:00:379:4530:18
9:45
#22204
15K
9.32 mi12:31:591:32:179:5431:40
10:12
#22258
20K
12.43 mi13:04:132:04:3110:0132:14
10:22
#22000
Half
13.11 mi13:11:012:11:1910:016:48
9:58
#21973
25K
15.53 mi13:36:232:36:4110:0525:22
10:28
#21695
30K
18.64 mi14:12:123:12:3010:2035:49
11:32
#21554
20M
20.00 mi14:28:123:28:3010:2516:00
11:46
#21511
21M
21.00 mi14:39:483:40:0610:2911:36
11:36
#21312
35K
21.75 mi14:48:493:49:0710:329:01
12:03
#21339
23M
23.00 mi15:03:004:03:1810:3514:11
11:20
#21227
24M
24.00 mi15:14:394:14:5710:3711:39
11:39
#21179
40K
24.85 mi15:25:354:25:5310:4210:56
12:47
#21229
25.2M
25.20 mi15:31:034:31:2110:465:28
15:51
#21294
Finish
26.22 mi15:46:574:47:1510:5815:54
15:36
#21686
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF60-64Seg. OverallSeg. FemalesSeg. F60-64
5K3.11 mi3.11 mi224409126912622317(Top 87%)9051(Top 83%)9051(Top 1649%)
10K6.21 mi3.10 mi22204+2369006+1209006+12021987(Top 86%)8905(Top 82%)8905(Top 1622%)
15K9.32 mi3.11 mi22258-549025-199025-1922317(Top 87%)9051(Top 83%)9051(Top 1649%)
20K12.43 mi3.11 mi22000+2588905+1208905+12021416(Top 84%)8589(Top 79%)8589(Top 1564%)
Half13.11 mi0.68 mi21973+278898+78898+721414(Top 84%)8631(Top 79%)8631(Top 1572%)
25K15.53 mi2.42 mi21695+2788755+1438755+14320337(Top 80%)8102(Top 74%)8102(Top 1476%)
30K18.64 mi3.11 mi21554+1418738+178738+1721078(Top 82%)8679(Top 79%)8679(Top 1581%)
20M20.00 mi1.36 mi21511+438748-108748-1020950(Top 82%)8718(Top 80%)8718(Top 1588%)
21M21.00 mi1.00 mi21312+1998651+978651+9717916(Top 70%)7293(Top 67%)7293(Top 1328%)
35K21.75 mi0.75 mi21339-278678-278678-2721889(Top 86%)9296(Top 85%)9296(Top 1693%)
23M23.00 mi1.25 mi21227+1128651+278651+2719253(Top 75%)8018(Top 73%)8018(Top 1460%)
24M24.00 mi1.00 mi21179+488646+58646+520714(Top 81%)8795(Top 81%)8795(Top 1602%)
40K24.85 mi0.85 mi21229-508690-448690-4421922(Top 86%)9431(Top 86%)9431(Top 1718%)
25.2M25.20 mi0.35 mi21294-658736-468736-4623933(Top 94%)10340(Top 95%)10340(Top 1883%)
Finish26.22 mi1.02 mi21686-3928947-2118947-21125295(Top 99%)10869(Top 99%)10869(Top 1980%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 87%
×21story building
+97ft-345ft

Overall

22317

Females

9051

F60-64

9051

5K→10K

3.1 - 6.2 mi

Top 86%
×5story building
+79ft-138ft

Overall

21987

Females

8905

F60-64

8905

10K→15K

6.2 - 9.3 mi

Top 87%
×3story building
+67ft-78ft

Overall

22317

Females

9051

F60-64

9051

15K→20K

9.3 - 12.4 mi

Top 84%
×5story building
+106ft-86ft

Overall

21416

Females

8589

F60-64

8589

20K→Half

12.4 - 13.1 mi

Top 84%
×2story building
+19ft-37ft

Overall

21414

Females

8631

F60-64

8631

Half→25K

13.1 - 15.5 mi

Top 80%
×4story building
+66ft-88ft

Overall

20337

Females

8102

F60-64

8102

25K→30K

15.5 - 18.6 mi

Top 82%
×9story building
+181ft-148ft

Overall

21078

Females

8679

F60-64

8679

30K→20M

18.6 - 20.0 mi

Top 82%
×5story building
+64ft-50ft

Overall

20950

Females

8718

F60-64

8718

20M→21M

20.0 - 21.0 mi

Top 70%
×8story building
+106ft-24ft

Overall

17916

Females

7293

F60-64

7293

21M→35K

21.0 - 21.8 mi

Top 86%
×7story building
+17ft-86ft

Overall

21889

Females

9296

F60-64

9296

35K→23M

21.8 - 23.0 mi

Top 75%
×5story building
+23ft-63ft

Overall

19253

Females

8018

F60-64

8018

23M→24M

23.0 - 24.0 mi

Top 81%
×6story building
+12ft-82ft

Overall

20714

Females

8795

F60-64

8795

24M→40K

24.0 - 24.9 mi

Top 86%
×1story
+6ft-20ft

Overall

21922

Females

9431

F60-64

9431

40K→25.2M

24.9 - 25.2 mi

Top 94%
×1story
+13ft-16ft

Overall

23933

Females

10340

F60-64

10340

25.2M→Finish

25.2 - 26.2 mi

Top 99%
×2story building
+22ft-21ft

Overall

25295

Females

10869

F60-64

10869

Passing Analysis

Category:
Athletes Passed
2040
Passed By
1286
Net Change
+754
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#22440
5K → 10K342106+236#22440#22204
10K → 15K151205-54#22204#22258
15K → 20K31860+258#22258#22000
20K → Half4316+27#22000#21973
Half → 25K30224+278#21973#21695
25K → 30K258117+141#21695#21554
30K → 20M10562+43#21554#21511
20M → 21M2056+199#21511#21312
21M → 35K3966-27#21312#21339
35K → 23M13119+112#21339#21227
23M → 24M8335+48#21227#21179
24M → 40K4090-50#21179#21229
40K → 25.2M1176-65#21229#21294
25.2M → Finish12404-392#21294#21686
TOTALS20401286+754
📊

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