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BOSTON MARATHON 2025

Debra Isser

Bib: 25064•F

DE

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Female)
#0 / 12228
Masters (Masters Women)
#0 / 6759
Division (F70-74)
#0 / 71
Top 6%
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
8:55/mi
27:41
↑ 97↓ 3451.5%
10K· 6.21 mi
9:02/mi
55:46
↑ 79↓ 1380.4%
15K· 9.32 mi
8:59/mi
1:23:42
↑ 67↓ 78
20K· 12.43 mi
9:01/mi
1:51:42
↑ 106↓ 860.1%
Half· 13.11 mi
8:54/mi
1:57:46
↑ 19↓ 370.5%
25K· 15.53 mi
9:09/mi
2:19:56
↑ 66↓ 880.2%
30K· 18.64 mi
9:22/mi
2:49:03
↑ 181↓ 1480.2%
20M
9:07/mi
3:01:26
↑ 64↓ 500.2%
21M
9:29/mi
3:10:55
↑ 106↓ 241.6%
35K· 21.75 mi
8:20/mi
3:17:09
↑ 17↓ 861.7%
23M
8:32/mi
3:27:50
↑ 23↓ 630.6%
24M
8:17/mi
3:36:07
↓ 821.3%
40K· 24.85 mi
8:21/mi
3:43:15
↓ 200.3%
25.2M
9:11/mi
3:46:25
↑ 13↓ 160.2%
Finish· 26.22 mi
8:23/mi
3:54:58
↑ 22↓ 21

The Course

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Half Splits

1st Half· via Half⚖️ Balanced
Distance13.11 mi
Time1:57:46
Pace8:59 /mi
2nd Half⚖️ Balanced
Distance13.11 mi
Time1:57:12
Pace8:56 /mi
📊Even Split: Consistent pacing between halves

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:29:0927:418:5527:41
8:55
-
10K
6.21 mi11:57:1455:468:5828:05
9:02
+0:07
15K
9.32 mi12:25:101:23:428:5927:56
8:59
-0:03
20K
12.43 mi12:53:101:51:428:5928:00
9:01
+0:02
Half
13.11 mi12:59:141:57:468:596:04
8:54
-0:07
25K
15.53 mi13:21:242:19:569:0022:10
9:09
+0:15
30K
18.64 mi13:50:312:49:039:0429:07
9:22
+0:13
20M
20.00 mi14:02:543:01:269:0412:23
9:07
-0:15
21M
21.00 mi14:12:233:10:559:059:29
9:29
+0:22
35K
21.75 mi14:18:373:17:099:046:14
8:20
-1:09
23M
23.00 mi14:29:183:27:509:0210:41
8:32
+0:12
24M
24.00 mi14:37:353:36:079:008:17
8:17
-0:15
40K
24.85 mi14:44:433:43:158:597:08
8:21
+0:04
25.2M
25.20 mi14:47:533:46:258:593:10
9:11
+0:50
Finish
26.22 mi14:56:263:54:588:588:33
8:23
-0:48

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

8:17 /mi

Average Pace

8:58 /mi

Slowest Pace

9:29 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:38:39

68% of race

Time at Steady Pace

1:16:19

32% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:58 /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 mi11:29:0927:418:5527:41
8:55
#22040
10K
6.21 mi11:57:1455:468:5828:05
9:02
#22328
15K
9.32 mi12:25:101:23:428:5927:56
8:59
#22196
20K
12.43 mi12:53:101:51:428:5928:00
9:01
#21886
Half
13.11 mi12:59:141:57:468:596:04
8:54
#21840
25K
15.53 mi13:21:242:19:569:0022:10
9:09
#21591
30K
18.64 mi13:50:312:49:039:0429:07
9:22
#21188
20M
20.00 mi14:02:543:01:269:0412:23
9:07
#20898
21M
21.00 mi14:12:233:10:559:059:29
9:29
#20604
35K
21.75 mi14:18:373:17:099:046:14
8:20
#20431
23M
23.00 mi14:29:183:27:509:0210:41
8:32
#20097
24M
24.00 mi14:37:353:36:079:008:17
8:17
#19828
40K
24.85 mi14:44:433:43:158:597:08
8:21
#19580
25.2M
25.20 mi14:47:533:46:258:593:10
9:11
#19473
Finish
26.22 mi14:56:263:54:588:588:33
8:23
#19329
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF70-74Seg. OverallSeg. FemalesSeg. F70-74
5K3.11 mi3.11 mi220408646864621992(Top 77%)8543(Top 70%)8543(Top 12032%)
10K6.21 mi3.10 mi22328-2888798-1528798-15222549(Top 79%)8890(Top 73%)8890(Top 12521%)
15K9.32 mi3.11 mi22196+1328697+1018697+10121992(Top 77%)8543(Top 70%)8543(Top 12032%)
20K12.43 mi3.11 mi21886+3108538+1598538+15921038(Top 74%)8080(Top 66%)8080(Top 11380%)
Half13.11 mi0.68 mi21840+468514+248514+2421361(Top 75%)8222(Top 67%)8222(Top 11580%)
25K15.53 mi2.42 mi21591+2498377+1378377+13720539(Top 72%)7834(Top 64%)7834(Top 11034%)
30K18.64 mi3.11 mi21188+4038185+1928185+19219433(Top 68%)7355(Top 60%)7355(Top 10359%)
20M20.00 mi1.36 mi20898+2908041+1448041+14417399(Top 61%)6372(Top 52%)6372(Top 8975%)
21M21.00 mi1.00 mi20604+2947908+1337908+13316032(Top 56%)5728(Top 47%)5728(Top 8068%)
35K21.75 mi0.75 mi20431+1737828+807828+8014550(Top 51%)5004(Top 41%)5004(Top 7048%)
23M23.00 mi1.25 mi20097+3347680+1487680+14813561(Top 48%)4567(Top 37%)4567(Top 6432%)
24M24.00 mi1.00 mi19828+2697549+1317549+13113199(Top 46%)4438(Top 36%)4438(Top 6251%)
40K24.85 mi0.85 mi19580+2487425+1247425+12412486(Top 44%)4195(Top 34%)4195(Top 5908%)
25.2M25.20 mi0.35 mi19473+1077370+557370+5512950(Top 46%)4508(Top 37%)4508(Top 6349%)
Finish26.22 mi1.02 mi19329+1447314+567314+5615559(Top 55%)5799(Top 47%)5799(Top 8168%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 77%
×21story building
+97ft-345ft

Overall

21992

Females

8543

F70-74

8543

5K→10K

3.1 - 6.2 mi

Top 79%
×5story building
+79ft-138ft

Overall

22549

Females

8890

F70-74

8890

10K→15K

6.2 - 9.3 mi

Top 77%
×3story building
+67ft-78ft

Overall

21992

Females

8543

F70-74

8543

15K→20K

9.3 - 12.4 mi

Top 74%
×5story building
+106ft-86ft

Overall

21038

Females

8080

F70-74

8080

20K→Half

12.4 - 13.1 mi

Top 75%
×2story building
+19ft-37ft

Overall

21361

Females

8222

F70-74

8222

Half→25K

13.1 - 15.5 mi

Top 72%
×4story building
+66ft-88ft

Overall

20539

Females

7834

F70-74

7834

25K→30K

15.5 - 18.6 mi

Top 68%
×9story building
+181ft-148ft

Overall

19433

Females

7355

F70-74

7355

30K→20M

18.6 - 20.0 mi

Top 61%
×5story building
+64ft-50ft

Overall

17399

Females

6372

F70-74

6372

20M→21M

20.0 - 21.0 mi

Top 56%
×8story building
+106ft-24ft

Overall

16032

Females

5728

F70-74

5728

21M→35K

21.0 - 21.8 mi

Top 51%
×7story building
+17ft-86ft

Overall

14550

Females

5004

F70-74

5004

35K→23M

21.8 - 23.0 mi

Top 48%
×5story building
+23ft-63ft

Overall

13561

Females

4567

F70-74

4567

23M→24M

23.0 - 24.0 mi

Top 46%
×6story building
+12ft-82ft

Overall

13199

Females

4438

F70-74

4438

24M→40K

24.0 - 24.9 mi

Top 44%
×1story
+6ft-20ft

Overall

12486

Females

4195

F70-74

4195

40K→25.2M

24.9 - 25.2 mi

Top 46%
×1story
+13ft-16ft

Overall

12950

Females

4508

F70-74

4508

25.2M→Finish

25.2 - 26.2 mi

Top 55%
×2story building
+22ft-21ft

Overall

15559

Females

5799

F70-74

5799

Passing Analysis

Category:
Athletes Passed
3400
Passed By
689
Net Change
+2711
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#22040
5K → 10K145433-288#22040#22328
10K → 15K253121+132#22328#22196
15K → 20K35343+310#22196#21886
20K → Half5812+46#21886#21840
Half → 25K27526+249#21840#21591
25K → 30K43835+403#21591#21188
30K → 20M2944+290#21188#20898
20M → 21M2973+294#20898#20604
21M → 35K1752+173#20604#20431
35K → 23M3340+334#20431#20097
23M → 24M2701+269#20097#19828
24M → 40K2480+248#19828#19580
40K → 25.2M1081+107#19580#19473
25.2M → Finish1528+144#19473#19329
TOTALS3400689+2711
📊

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