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BOSTON MARATHON 2025

Kim Loeffler

Bib: 23763•F

VT

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Female)
#0 / 12228
Masters (Masters Women)
#0 / 6759
Division (F50-54)
#0 / 1303
Top 49%
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
8:30/mi
26:26
↑ 97↓ 3451.5%
10K· 6.21 mi
8:34/mi
53:02
↑ 79↓ 1380.4%
15K· 9.32 mi
8:29/mi
1:19:22
↑ 67↓ 78
20K· 12.43 mi
8:26/mi
1:45:34
↑ 106↓ 860.1%
Half· 13.11 mi
8:21/mi
1:51:16
↑ 19↓ 370.5%
25K· 15.53 mi
8:25/mi
2:11:41
↑ 66↓ 880.2%
30K· 18.64 mi
8:45/mi
2:38:52
↑ 181↓ 1480.2%
20M
8:58/mi
2:51:03
↑ 64↓ 500.2%
21M
9:35/mi
3:00:38
↑ 106↓ 241.6%
35K· 21.75 mi
8:28/mi
3:06:58
↑ 17↓ 861.7%
23M
8:42/mi
3:17:51
↑ 23↓ 630.6%
24M
8:32/mi
3:26:23
↓ 821.3%
40K· 24.85 mi
9:32/mi
3:34:32
↓ 200.3%
25.2M
13:38/mi
3:39:14
↑ 13↓ 160.2%
Finish· 26.22 mi
14:35/mi
3:54:06
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:51:16
Pace8:29 /mi
2nd Half
Distance13.11 mi
Time2:02:50
Pace9:22 /mi
📊Positive Split: 10.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:25:4326:268:3026:26
8:30
-
10K
6.21 mi11:52:1953:028:3226:36
8:34
+0:04
15K
9.32 mi12:18:391:19:228:3126:20
8:29
-0:05
20K
12.43 mi12:44:511:45:348:3026:12
8:26
-0:03
Half
13.11 mi12:50:331:51:168:295:42
8:21
-0:05
25K
15.53 mi13:10:582:11:418:2920:25
8:25
+0:04
30K
18.64 mi13:38:092:38:528:3127:11
8:45
+0:20
20M
20.00 mi13:50:202:51:038:3312:11
8:58
+0:13
21M
21.00 mi13:59:553:00:388:369:35
9:35
+0:37
35K
21.75 mi14:06:153:06:588:366:20
8:28
-1:07
23M
23.00 mi14:17:083:17:518:3610:53
8:42
+0:14
24M
24.00 mi14:25:403:26:238:368:32
8:32
-0:10
40K
24.85 mi14:33:493:34:328:388:09
9:32
+1:00
25.2M
25.20 mi14:38:313:39:148:424:42
13:38
+4:06
Finish
26.22 mi14:53:233:54:068:5614:52
14:35
+0:57

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

8:21 /mi

Average Pace

8:56 /mi

Slowest Pace

14:35 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

0:00

0% of race

Time at Steady Pace

3:16:48

84% of race

Time at Slower Pace

37:18

16% of race

Average Pace: 8:56 /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 mi11:25:4326:268:3026:26
8:30
#19935
10K
6.21 mi11:52:1953:028:3226:36
8:34
#20050
15K
9.32 mi12:18:391:19:228:3126:20
8:29
#19774
20K
12.43 mi12:44:511:45:348:3026:12
8:26
#19230
Half
13.11 mi12:50:331:51:168:295:42
8:21
#19185
25K
15.53 mi13:10:582:11:418:2920:25
8:25
#18778
30K
18.64 mi13:38:092:38:528:3127:11
8:45
#18281
20M
20.00 mi13:50:202:51:038:3312:11
8:58
#18116
21M
21.00 mi13:59:553:00:388:369:35
9:35
#18025
35K
21.75 mi14:06:153:06:588:366:20
8:28
#17916
23M
23.00 mi14:17:083:17:518:3610:53
8:42
#17687
24M
24.00 mi14:25:403:26:238:368:32
8:32
#17533
40K
24.85 mi14:33:493:34:328:388:09
9:32
#17586
25.2M
25.20 mi14:38:313:39:148:424:42
13:38
#17895
Finish
26.22 mi14:53:233:54:068:5614:52
14:35
#19154
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF50-54Seg. OverallSeg. FemalesSeg. F50-54
5K3.11 mi3.11 mi199357462746219196(Top 68%)7003(Top 57%)7003(Top 537%)
10K6.21 mi3.10 mi20050-1157498-367498-3620161(Top 71%)7553(Top 62%)7553(Top 580%)
15K9.32 mi3.11 mi19774+2767336+1627336+16219196(Top 68%)7003(Top 57%)7003(Top 537%)
20K12.43 mi3.11 mi19230+5447039+2977039+29717778(Top 63%)6213(Top 51%)6213(Top 477%)
Half13.11 mi0.68 mi19185+457014+257014+2518393(Top 65%)6570(Top 54%)6570(Top 504%)
25K15.53 mi2.42 mi18778+4076788+2266788+22616720(Top 59%)5705(Top 47%)5705(Top 438%)
30K18.64 mi3.11 mi18281+4976553+2356553+23516309(Top 57%)5642(Top 46%)5642(Top 433%)
20M20.00 mi1.36 mi18116+1656483+706483+7016646(Top 59%)5954(Top 49%)5954(Top 457%)
21M21.00 mi1.00 mi18025+916449+346449+3416497(Top 58%)5985(Top 49%)5985(Top 459%)
35K21.75 mi0.75 mi17916+1096391+586391+5815325(Top 54%)5436(Top 44%)5436(Top 417%)
23M23.00 mi1.25 mi17687+2296323+686323+6814544(Top 51%)5102(Top 42%)5102(Top 392%)
24M24.00 mi1.00 mi17533+1546267+566267+5614777(Top 52%)5265(Top 43%)5265(Top 404%)
40K24.85 mi0.85 mi17586-536324-576324-5718858(Top 66%)7558(Top 62%)7558(Top 580%)
25.2M25.20 mi0.35 mi17895-3096496-1726496-17225859(Top 91%)11109(Top 91%)11109(Top 853%)
Finish26.22 mi1.02 mi19154-12597218-7227218-72228184(Top 99%)12158(Top 99%)12158(Top 933%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 68%
×21story building
+97ft-345ft

Overall

19196

Females

7003

F50-54

7003

5K→10K

3.1 - 6.2 mi

Top 71%
×5story building
+79ft-138ft

Overall

20161

Females

7553

F50-54

7553

10K→15K

6.2 - 9.3 mi

Top 68%
×3story building
+67ft-78ft

Overall

19196

Females

7003

F50-54

7003

15K→20K

9.3 - 12.4 mi

Top 63%
×5story building
+106ft-86ft

Overall

17778

Females

6213

F50-54

6213

20K→Half

12.4 - 13.1 mi

Top 65%
×2story building
+19ft-37ft

Overall

18393

Females

6570

F50-54

6570

Half→25K

13.1 - 15.5 mi

Top 59%
×4story building
+66ft-88ft

Overall

16720

Females

5705

F50-54

5705

25K→30K

15.5 - 18.6 mi

Top 57%
×9story building
+181ft-148ft

Overall

16309

Females

5642

F50-54

5642

30K→20M

18.6 - 20.0 mi

Top 59%
×5story building
+64ft-50ft

Overall

16646

Females

5954

F50-54

5954

20M→21M

20.0 - 21.0 mi

Top 58%
×8story building
+106ft-24ft

Overall

16497

Females

5985

F50-54

5985

21M→35K

21.0 - 21.8 mi

Top 54%
×7story building
+17ft-86ft

Overall

15325

Females

5436

F50-54

5436

35K→23M

21.8 - 23.0 mi

Top 51%
×5story building
+23ft-63ft

Overall

14544

Females

5102

F50-54

5102

23M→24M

23.0 - 24.0 mi

Top 52%
×6story building
+12ft-82ft

Overall

14777

Females

5265

F50-54

5265

24M→40K

24.0 - 24.9 mi

Top 66%
×1story
+6ft-20ft

Overall

18858

Females

7558

F50-54

7558

40K→25.2M

24.9 - 25.2 mi

Top 91%
×1story
+13ft-16ft

Overall

25859

Females

11109

F50-54

11109

25.2M→Finish

25.2 - 26.2 mi

Top 99%
×2story building
+22ft-21ft

Overall

28184

Females

12158

F50-54

12158

Passing Analysis

Category:
Athletes Passed
3081
Passed By
2300
Net Change
+781
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#19935
5K → 10K230345-115#19935#20050
10K → 15K34771+276#20050#19774
15K → 20K56420+544#19774#19230
20K → Half6217+45#19230#19185
Half → 25K4136+407#19185#18778
25K → 30K53437+497#18778#18281
30K → 20M20843+165#18281#18116
20M → 21M13544+91#18116#18025
21M → 35K12011+109#18025#17916
35K → 23M24617+229#17916#17687
23M → 24M16814+154#17687#17533
24M → 40K51104-53#17533#17586
40K → 25.2M2311-309#17586#17895
25.2M → Finish11260-1259#17895#19154
TOTALS30812300+781
📊

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