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BOSTON MARATHON 2025

Karen Byng

Bib: 24688•F

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Female)
#0 / 12228
Masters (Masters Women)
#0 / 6759
Division (F55-59)
#0 / 994
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
9:03/mi
28:08
↑ 97↓ 3451.5%
10K· 6.21 mi
9:09/mi
56:35
↑ 79↓ 1380.4%
15K· 9.32 mi
9:19/mi
1:25:32
↑ 67↓ 78
20K· 12.43 mi
9:35/mi
1:55:19
↑ 106↓ 860.1%
Half· 13.11 mi
9:07/mi
2:01:32
↑ 19↓ 370.5%
25K· 15.53 mi
9:28/mi
2:24:29
↑ 66↓ 880.2%
30K· 18.64 mi
9:53/mi
2:55:11
↑ 181↓ 1480.2%
20M
10:04/mi
3:08:52
↑ 64↓ 500.2%
21M
10:42/mi
3:19:34
↑ 106↓ 241.6%
35K· 21.75 mi
9:01/mi
3:26:19
↑ 17↓ 861.7%
23M
9:31/mi
3:38:14
↑ 23↓ 630.6%
24M
9:25/mi
3:47:39
↓ 821.3%
40K· 24.85 mi
9:40/mi
3:55:55
↓ 200.3%
25.2M
10:47/mi
3:59:38
↑ 13↓ 160.2%
Finish· 26.22 mi
9:30/mi
4:09:19
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:01:32
Pace9:16 /mi
2nd Half
Distance13.11 mi
Time2:07:47
Pace9:45 /mi
📊Positive Split: 5.1% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:29:1228:089:0328:08
9:03
-
10K
6.21 mi11:57:3956:359:0628:27
9:09
+0:06
15K
9.32 mi12:26:361:25:329:1128:57
9:19
+0:10
20K
12.43 mi12:56:231:55:199:1729:47
9:35
+0:16
Half
13.11 mi13:02:362:01:329:166:13
9:07
-0:28
25K
15.53 mi13:25:332:24:299:1822:57
9:28
+0:21
30K
18.64 mi13:56:152:55:119:2430:42
9:53
+0:25
20M
20.00 mi14:09:563:08:529:2713:41
10:04
+0:11
21M
21.00 mi14:20:383:19:349:3010:42
10:42
+0:38
35K
21.75 mi14:27:233:26:199:296:45
9:01
-1:41
23M
23.00 mi14:39:183:38:149:2911:55
9:31
+0:30
24M
24.00 mi14:48:433:47:399:299:25
9:25
-0:06
40K
24.85 mi14:56:593:55:559:308:16
9:40
+0:15
25.2M
25.20 mi15:00:423:59:389:313:43
10:47
+1:07
Finish
26.22 mi15:10:234:09:199:319:41
9:30
-1:17

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

9:01 /mi

Average Pace

9:31 /mi

Slowest Pace

10:47 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:41:13

89% of race

Time at Steady Pace

13:41

5% of race

Time at Slower Pace

14:25

6% of race

Average Pace: 9:31 /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 mi11:29:1228:089:0328:08
9:03
#22672
10K
6.21 mi11:57:3956:359:0628:27
9:09
#22838
15K
9.32 mi12:26:361:25:329:1128:57
9:19
#23002
20K
12.43 mi12:56:231:55:199:1729:47
9:35
#23071
Half
13.11 mi13:02:362:01:329:166:13
9:07
#23038
25K
15.53 mi13:25:332:24:299:1822:57
9:28
#22792
30K
18.64 mi13:56:152:55:119:2430:42
9:53
#22481
20M
20.00 mi14:09:563:08:529:2713:41
10:04
#22391
21M
21.00 mi14:20:383:19:349:3010:42
10:42
#22265
35K
21.75 mi14:27:233:26:199:296:45
9:01
#22126
23M
23.00 mi14:39:183:38:149:2911:55
9:31
#21914
24M
24.00 mi14:48:433:47:399:299:25
9:25
#21806
40K
24.85 mi14:56:593:55:559:308:16
9:40
#21720
25.2M
25.20 mi15:00:423:59:389:313:43
10:47
#21692
Finish
26.22 mi15:10:234:09:199:319:41
9:30
#21646
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF55-59Seg. OverallSeg. FemalesSeg. F55-59
5K3.11 mi3.11 mi226728994899423273(Top 82%)9244(Top 76%)9244(Top 930%)
10K6.21 mi3.10 mi22838-1669066-729066-7223036(Top 81%)9155(Top 75%)9155(Top 921%)
15K9.32 mi3.11 mi23002-1649127-619127-6123273(Top 82%)9244(Top 76%)9244(Top 930%)
20K12.43 mi3.11 mi23071-699164-379164-3723169(Top 82%)9231(Top 75%)9231(Top 929%)
Half13.11 mi0.68 mi23038+339145+199145+1922288(Top 78%)8770(Top 72%)8770(Top 882%)
25K15.53 mi2.42 mi22792+2469030+1159030+11521753(Top 77%)8521(Top 70%)8521(Top 857%)
30K18.64 mi3.11 mi22481+3118903+1278903+12721249(Top 75%)8372(Top 68%)8372(Top 842%)
20M20.00 mi1.36 mi22391+908870+338870+3321192(Top 75%)8467(Top 69%)8467(Top 852%)
21M21.00 mi1.00 mi22265+1268811+598811+5920614(Top 73%)8255(Top 68%)8255(Top 830%)
35K21.75 mi0.75 mi22126+1398749+628749+6218400(Top 65%)7143(Top 58%)7143(Top 719%)
23M23.00 mi1.25 mi21914+2128670+798670+7918805(Top 66%)7412(Top 61%)7412(Top 746%)
24M24.00 mi1.00 mi21806+1088633+378633+3719341(Top 68%)7738(Top 63%)7738(Top 778%)
40K24.85 mi0.85 mi21720+868610+238610+2319380(Top 68%)7832(Top 64%)7832(Top 788%)
25.2M25.20 mi0.35 mi21692+288604+68604+620009(Top 70%)8170(Top 67%)8170(Top 822%)
Finish26.22 mi1.02 mi21646+468588+168588+1621206(Top 75%)8762(Top 72%)8762(Top 881%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 82%
×21story building
+97ft-345ft

Overall

23273

Females

9244

F55-59

9244

5K→10K

3.1 - 6.2 mi

Top 81%
×5story building
+79ft-138ft

Overall

23036

Females

9155

F55-59

9155

10K→15K

6.2 - 9.3 mi

Top 82%
×3story building
+67ft-78ft

Overall

23273

Females

9244

F55-59

9244

15K→20K

9.3 - 12.4 mi

Top 82%
×5story building
+106ft-86ft

Overall

23169

Females

9231

F55-59

9231

20K→Half

12.4 - 13.1 mi

Top 78%
×2story building
+19ft-37ft

Overall

22288

Females

8770

F55-59

8770

Half→25K

13.1 - 15.5 mi

Top 77%
×4story building
+66ft-88ft

Overall

21753

Females

8521

F55-59

8521

25K→30K

15.5 - 18.6 mi

Top 75%
×9story building
+181ft-148ft

Overall

21249

Females

8372

F55-59

8372

30K→20M

18.6 - 20.0 mi

Top 75%
×5story building
+64ft-50ft

Overall

21192

Females

8467

F55-59

8467

20M→21M

20.0 - 21.0 mi

Top 73%
×8story building
+106ft-24ft

Overall

20614

Females

8255

F55-59

8255

21M→35K

21.0 - 21.8 mi

Top 65%
×7story building
+17ft-86ft

Overall

18400

Females

7143

F55-59

7143

35K→23M

21.8 - 23.0 mi

Top 66%
×5story building
+23ft-63ft

Overall

18805

Females

7412

F55-59

7412

23M→24M

23.0 - 24.0 mi

Top 68%
×6story building
+12ft-82ft

Overall

19341

Females

7738

F55-59

7738

24M→40K

24.0 - 24.9 mi

Top 68%
×1story
+6ft-20ft

Overall

19380

Females

7832

F55-59

7832

40K→25.2M

24.9 - 25.2 mi

Top 70%
×1story
+13ft-16ft

Overall

20009

Females

8170

F55-59

8170

25.2M→Finish

25.2 - 26.2 mi

Top 75%
×2story building
+22ft-21ft

Overall

21206

Females

8762

F55-59

8762

Passing Analysis

Category:
Athletes Passed
2078
Passed By
1052
Net Change
+1026
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#22672
5K → 10K181347-166#22672#22838
10K → 15K116280-164#22838#23002
15K → 20K150219-69#23002#23071
20K → Half4613+33#23071#23038
Half → 25K27327+246#23038#22792
25K → 30K35847+311#22792#22481
30K → 20M12131+90#22481#22391
20M → 21M14822+126#22391#22265
21M → 35K1423+139#22265#22126
35K → 23M2153+212#22126#21914
23M → 24M1168+108#21914#21806
24M → 40K10115+86#21806#21720
40K → 25.2M4012+28#21720#21692
25.2M → Finish7125+46#21692#21646
TOTALS20781052+1026
📊

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