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BOSTON MARATHON 2025

Ruby Hoi Cheng Mak

Bib: 16442 F MO

0:00
0:00
/ mi
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Overall
#0 / 28404
Gender (Female)
#0 / 12228
Top 42%
Division (F18-39)
#0 / 5469
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
469 ft elev
5K· 3.11 mi
7:53/mi
24:30
↑ 97↓ 3451.5%
220 ft elev
10K· 6.21 mi
7:44/mi
48:32
↑ 79↓ 1380.4%
157 ft elev
15K· 9.32 mi
7:53/mi
1:13:03
↑ 67↓ 78
146 ft elev
20K· 12.43 mi
8:03/mi
1:38:04
↑ 106↓ 860.1%
165 ft elev
Half· 13.11 mi
7:43/mi
1:43:20
↑ 19↓ 370.5%
148 ft elev
25K· 15.53 mi
8:13/mi
2:03:16
↑ 66↓ 880.2%
127 ft elev
30K· 18.64 mi
8:48/mi
2:30:35
↑ 181↓ 1480.2%
138 ft elev
20M
8:58/mi
2:42:46
↑ 64↓ 500.2%
148 ft elev
21M
9:25/mi
2:52:11
↑ 106↓ 241.6%
227 ft elev
35K· 21.75 mi
8:36/mi
2:58:37
↑ 17↓ 861.7%
156 ft elev
23M
9:00/mi
3:09:53
↑ 23↓ 630.6%
116 ft elev
24M
8:43/mi
3:18:36
↓ 821.3%
34 ft elev
40K· 24.85 mi
8:49/mi
3:26:08
↓ 200.3%
20 ft elev
25.2M
9:34/mi
3:29:26
↑ 13↓ 160.2%
18 ft elev
Finish· 26.22 mi
8:23/mi
3:37:59
↑ 22↓ 21
17 ft elev
Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent

The Course

Half Splits

1st Half· via Half
1:43:207:53 /mi⚡ faster
2nd Half
1:54:398:45 /mi+11.0%
Positive split — 11.0% slower in the second half
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Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:59:0224:307:5324:30
7:53
-
10K
6.21 mi11:23:0448:327:4924:02
7:44
-0:09
15K
9.32 mi11:47:351:13:037:5024:31
7:53
+0:09
20K
12.43 mi12:12:361:38:047:5325:01
8:03
+0:10
Half
13.11 mi12:17:521:43:207:535:16
7:43
-0:20
25K
15.53 mi12:37:482:03:167:5619:56
8:13
+0:30
30K
18.64 mi13:05:072:30:358:0527:19
8:48
+0:35
20M
20.00 mi13:17:182:42:468:0812:11
8:58
+0:10
21M
21.00 mi13:26:432:52:118:129:25
9:25
+0:27
35K
21.75 mi13:33:092:58:378:136:26
8:36
-0:49
23M
23.00 mi13:44:253:09:538:1511:16
9:00
+0:24
24M
24.00 mi13:53:083:18:368:178:43
8:43
-0:17
40K
24.85 mi14:00:403:26:088:187:32
8:49
+0:06
25.2M
25.20 mi14:03:583:29:268:193:18
9:34
+0:45
Finish
26.22 mi14:12:313:37:598:198:33
8:23
-1:11

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

7:43 /mi

Average Pace

8:19 /mi

Slowest Pace

9:34 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:03:16

57% of race

Time at Steady Pace

58:33

27% of race

Time at Slower Pace

36:10

17% of race

Average Pace: 8:19 /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 mi10:59:0224:307:5324:30
7:53
#15565
10K
6.21 mi11:23:0448:327:4924:02
7:44
#14886
15K
9.32 mi11:47:351:13:037:5024:31
7:53
#14970
20K
12.43 mi12:12:361:38:047:5325:01
8:03
#15021
Half
13.11 mi12:17:521:43:207:535:16
7:43
#14945
25K
15.53 mi12:37:482:03:167:5619:56
8:13
#15047
30K
18.64 mi13:05:072:30:358:0527:19
8:48
#15353
20M
20.00 mi13:17:182:42:468:0812:11
8:58
#15418
21M
21.00 mi13:26:432:52:118:129:25
9:25
#15385
35K
21.75 mi13:33:092:58:378:136:26
8:36
#15407
23M
23.00 mi13:44:253:09:538:1511:16
9:00
#15431
24M
24.00 mi13:53:083:18:368:178:43
8:43
#15433
40K
24.85 mi14:00:403:26:088:187:32
8:49
#15399
25.2M
25.20 mi14:03:583:29:268:193:18
9:34
#15384
Finish
26.22 mi14:12:313:37:598:198:33
8:23
#15378
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi15565487248721518746834683
10K6.21 mi3.10 mi14886+6794484+3884484+3881422941004100
15K9.32 mi3.11 mi14970-844540-564540-561518746834683
20K12.43 mi3.11 mi15021-514598-584598-581531248104810
Half13.11 mi0.68 mi14945+764561+374561+371367338953895
25K15.53 mi2.42 mi15047-1024638-774638-771545549894989
30K18.64 mi3.11 mi15353-3064858-2204858-2201655957755775
20M20.00 mi1.36 mi15418-654934-764934-761661659245924
21M21.00 mi1.00 mi15385+334942-84942-81571755575557
35K21.75 mi0.75 mi15407-224978-364978-361607058135813
23M23.00 mi1.25 mi15431-245035-575035-571624560196019
24M24.00 mi1.00 mi15433-25058-235058-231584558355835
40K24.85 mi0.85 mi15399+345066-85066-81526356655665
25.2M25.20 mi0.35 mi15384+155071-55071-51499055375537
Finish26.22 mi1.02 mi15378+65092-215092-211553157715771

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 53%
×21story building
+97ft-345ft

Overall

15187

Females

4683

F18-39

4683

5K→10K

3.1 - 6.2 mi

Top 50%
×5story building
+79ft-138ft

Overall

14229

Females

4100

F18-39

4100

10K→15K

6.2 - 9.3 mi

Top 53%
×3story building
+67ft-78ft

Overall

15187

Females

4683

F18-39

4683

15K→20K

9.3 - 12.4 mi

Top 54%
×5story building
+106ft-86ft

Overall

15312

Females

4810

F18-39

4810

20K→Half

12.4 - 13.1 mi

Top 48%
×2story building
+19ft-37ft

Overall

13673

Females

3895

F18-39

3895

Half→25K

13.1 - 15.5 mi

Top 54%
×4story building
+66ft-88ft

Overall

15455

Females

4989

F18-39

4989

25K→30K

15.5 - 18.6 mi

Top 58%
×9story building
+181ft-148ft

Overall

16559

Females

5775

F18-39

5775

30K→20M

18.6 - 20.0 mi

Top 58%
×5story building
+64ft-50ft

Overall

16616

Females

5924

F18-39

5924

20M→21M

20.0 - 21.0 mi

Top 55%
×8story building
+106ft-24ft

Overall

15717

Females

5557

F18-39

5557

21M→35K

21.0 - 21.8 mi

Top 57%
×7story building
+17ft-86ft

Overall

16070

Females

5813

F18-39

5813

35K→23M

21.8 - 23.0 mi

Top 57%
×5story building
+23ft-63ft

Overall

16245

Females

6019

F18-39

6019

23M→24M

23.0 - 24.0 mi

Top 56%
×6story building
+12ft-82ft

Overall

15845

Females

5835

F18-39

5835

24M→40K

24.0 - 24.9 mi

Top 54%
×1story
+6ft-20ft

Overall

15263

Females

5665

F18-39

5665

40K→25.2M

24.9 - 25.2 mi

Top 53%
×1story
+13ft-16ft

Overall

14990

Females

5537

F18-39

5537

25.2M→Finish

25.2 - 26.2 mi

Top 55%
×2story building
+22ft-21ft

Overall

15531

Females

5771

F18-39

5771

Passing Analysis

Category:
Athletes Passed
2167
Passed By
1980
Net Change
+187
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#15565
5K → 10K76788+679#15565#14886
10K → 15K173257-84#14886#14970
15K → 20K199250-51#14970#15021
20K → Half8610+76#15021#14945
Half → 25K150252-102#14945#15047
25K → 30K162468-306#15047#15353
30K → 20M103168-65#15353#15418
20M → 21M11683+33#15418#15385
21M → 35K6082-22#15385#15407
35K → 23M104128-24#15407#15431
23M → 24M6365-2#15431#15433
24M → 40K8955+34#15433#15399
40K → 25.2M3520+15#15399#15384
25.2M → Finish6054+6#15384#15378
TOTALS21671980+187

Passing Charts

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