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BOSTON MARATHON 2025

Kim Chula-Maguire

Bib: 21520•F

RI

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Female)
#0 / 12228
Top 37%
Masters (Masters Women)
#0 / 6759
Top 23%
Division (F50-54)
#0 / 1303
Top 15%
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
8:13/mi
25:31
↑ 97↓ 3451.5%
10K· 6.21 mi
8:04/mi
50:36
↑ 79↓ 1380.4%
15K· 9.32 mi
8:01/mi
1:15:29
↑ 67↓ 78
20K· 12.43 mi
8:03/mi
1:40:30
↑ 106↓ 860.1%
Half· 13.11 mi
7:53/mi
1:45:53
↑ 19↓ 370.5%
25K· 15.53 mi
8:03/mi
2:05:25
↑ 66↓ 880.2%
30K· 18.64 mi
8:19/mi
2:31:15
↑ 181↓ 1480.2%
20M
8:28/mi
2:42:45
↑ 64↓ 500.2%
21M
8:36/mi
2:51:21
↑ 106↓ 241.6%
35K· 21.75 mi
7:55/mi
2:57:16
↑ 17↓ 861.7%
23M
8:14/mi
3:07:34
↑ 23↓ 630.6%
24M
7:54/mi
3:15:28
↓ 821.3%
40K· 24.85 mi
8:42/mi
3:22:54
↓ 200.3%
25.2M
9:02/mi
3:26:01
↑ 13↓ 160.2%
Finish· 26.22 mi
8:30/mi
3:34:41
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:45:53
Pace8:05 /mi
2nd Half
Distance13.11 mi
Time1:48:48
Pace8:18 /mi
📊Positive Split: 2.8% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:21:1525:318:1325:31
8:13
-
10K
6.21 mi11:46:2050:368:0925:05
8:04
-0:09
15K
9.32 mi12:11:131:15:298:0624:53
8:01
-0:03
20K
12.43 mi12:36:141:40:308:0525:01
8:03
+0:02
Half
13.11 mi12:41:371:45:538:055:23
7:53
-0:10
25K
15.53 mi13:01:092:05:258:0419:32
8:03
+0:10
30K
18.64 mi13:26:592:31:158:0725:50
8:19
+0:16
20M
20.00 mi13:38:292:42:458:0811:30
8:28
+0:09
21M
21.00 mi13:47:052:51:218:108:36
8:36
+0:08
35K
21.75 mi13:53:002:57:168:095:55
7:55
-0:41
23M
23.00 mi14:03:183:07:348:0910:18
8:14
+0:19
24M
24.00 mi14:11:123:15:288:097:54
7:54
-0:20
40K
24.85 mi14:18:383:22:548:107:26
8:42
+0:48
25.2M
25.20 mi14:21:453:26:018:113:07
9:02
+0:20
Finish
26.22 mi14:30:253:34:418:128:40
8:30
-0:32

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

7:53 /mi

Average Pace

8:12 /mi

Slowest Pace

9:02 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:24:08

95% of race

Time at Steady Pace

10:33

5% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:11 /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 mi11:21:1525:318:1325:31
8:13
#18202
10K
6.21 mi11:46:2050:368:0925:05
8:04
#17597
15K
9.32 mi12:11:131:15:298:0624:53
8:01
#17068
20K
12.43 mi12:36:141:40:308:0525:01
8:03
#16581
Half
13.11 mi12:41:371:45:538:055:23
7:53
#16514
25K
15.53 mi13:01:092:05:258:0419:32
8:03
#16124
30K
18.64 mi13:26:592:31:158:0725:50
8:19
#15618
20M
20.00 mi13:38:292:42:458:0811:30
8:28
#15412
21M
21.00 mi13:47:052:51:218:108:36
8:36
#15096
35K
21.75 mi13:53:002:57:168:095:55
7:55
#14958
23M
23.00 mi14:03:183:07:348:0910:18
8:14
#14701
24M
24.00 mi14:11:123:15:288:097:54
7:54
#14509
40K
24.85 mi14:18:383:22:548:107:26
8:42
#14479
25.2M
25.20 mi14:21:453:26:018:113:07
9:02
#14426
Finish
26.22 mi14:30:253:34:418:128:40
8:30
#14482
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF50-54Seg. OverallSeg. FemalesSeg. F50-54
5K3.11 mi3.11 mi182026460646016121(Top 57%)5212(Top 43%)5212(Top 400%)
10K6.21 mi3.10 mi17597+6056094+3666094+36617021(Top 60%)5713(Top 47%)5713(Top 438%)
15K9.32 mi3.11 mi17068+5295754+3405754+34016121(Top 57%)5212(Top 43%)5212(Top 400%)
20K12.43 mi3.11 mi16581+4875487+2675487+26715303(Top 54%)4801(Top 39%)4801(Top 368%)
Half13.11 mi0.68 mi16514+675443+445443+4415068(Top 53%)4651(Top 38%)4651(Top 357%)
25K15.53 mi2.42 mi16124+3905230+2135230+21314334(Top 50%)4387(Top 36%)4387(Top 337%)
30K18.64 mi3.11 mi15618+5065005+2255005+22513610(Top 48%)4155(Top 34%)4155(Top 319%)
20M20.00 mi1.36 mi15412+2064930+754930+7513561(Top 48%)4278(Top 35%)4278(Top 328%)
21M21.00 mi1.00 mi15096+3164780+1504780+15011143(Top 39%)3183(Top 26%)3183(Top 244%)
35K21.75 mi0.75 mi14958+1384711+694711+6911709(Top 41%)3511(Top 29%)3511(Top 269%)
23M23.00 mi1.25 mi14701+2574601+1104601+11011575(Top 41%)3530(Top 29%)3530(Top 271%)
24M24.00 mi1.00 mi14509+1924520+814520+8110599(Top 37%)3110(Top 25%)3110(Top 239%)
40K24.85 mi0.85 mi14479+304533-134533-1314590(Top 51%)5289(Top 43%)5289(Top 406%)
25.2M25.20 mi0.35 mi14426+534518+154518+1512091(Top 43%)4032(Top 33%)4032(Top 309%)
Finish26.22 mi1.02 mi14482-564581-634581-6316254(Top 57%)6158(Top 50%)6158(Top 473%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 57%
×21story building
+97ft-345ft

Overall

16121

Females

5212

F50-54

5212

5K→10K

3.1 - 6.2 mi

Top 60%
×5story building
+79ft-138ft

Overall

17021

Females

5713

F50-54

5713

10K→15K

6.2 - 9.3 mi

Top 57%
×3story building
+67ft-78ft

Overall

16121

Females

5212

F50-54

5212

15K→20K

9.3 - 12.4 mi

Top 54%
×5story building
+106ft-86ft

Overall

15303

Females

4801

F50-54

4801

20K→Half

12.4 - 13.1 mi

Top 53%
×2story building
+19ft-37ft

Overall

15068

Females

4651

F50-54

4651

Half→25K

13.1 - 15.5 mi

Top 50%
×4story building
+66ft-88ft

Overall

14334

Females

4387

F50-54

4387

25K→30K

15.5 - 18.6 mi

Top 48%
×9story building
+181ft-148ft

Overall

13610

Females

4155

F50-54

4155

30K→20M

18.6 - 20.0 mi

Top 48%
×5story building
+64ft-50ft

Overall

13561

Females

4278

F50-54

4278

20M→21M

20.0 - 21.0 mi

Top 39%
×8story building
+106ft-24ft

Overall

11143

Females

3183

F50-54

3183

21M→35K

21.0 - 21.8 mi

Top 41%
×7story building
+17ft-86ft

Overall

11709

Females

3511

F50-54

3511

35K→23M

21.8 - 23.0 mi

Top 41%
×5story building
+23ft-63ft

Overall

11575

Females

3530

F50-54

3530

23M→24M

23.0 - 24.0 mi

Top 37%
×6story building
+12ft-82ft

Overall

10599

Females

3110

F50-54

3110

24M→40K

24.0 - 24.9 mi

Top 51%
×1story
+6ft-20ft

Overall

14590

Females

5289

F50-54

5289

40K→25.2M

24.9 - 25.2 mi

Top 43%
×1story
+13ft-16ft

Overall

12091

Females

4032

F50-54

4032

25.2M→Finish

25.2 - 26.2 mi

Top 57%
×2story building
+22ft-21ft

Overall

16254

Females

6158

F50-54

6158

Passing Analysis

Category:
Athletes Passed
4150
Passed By
430
Net Change
+3720
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#18202
5K → 10K68580+605#18202#17597
10K → 15K56536+529#17597#17068
15K → 20K51326+487#17068#16581
20K → Half769+67#16581#16514
Half → 25K40414+390#16514#16124
25K → 30K53630+506#16124#15618
30K → 20M22923+206#15618#15412
20M → 21M3193+316#15412#15096
21M → 35K1468+138#15096#14958
35K → 23M27013+257#14958#14701
23M → 24M1986+192#14701#14509
24M → 40K8858+30#14509#14479
40K → 25.2M618+53#14479#14426
25.2M → Finish60116-56#14426#14482
TOTALS4150430+3720
📊

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