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BOSTON MARATHON 2025

Marni Zelnick

Bib: 27176•F

MA

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Female)
#0 / 12228
Masters (Masters Women)
#0 / 6759
Division (F45-49)
#0 / 1813
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
8:53/mi
27:35
↑ 97↓ 3451.5%
10K· 6.21 mi
8:34/mi
54:11
↑ 79↓ 1380.4%
15K· 9.32 mi
8:29/mi
1:20:33
↑ 67↓ 78
20K· 12.43 mi
8:42/mi
1:47:35
↑ 106↓ 860.1%
Half· 13.11 mi
8:42/mi
1:53:31
↑ 19↓ 370.5%
25K· 15.53 mi
9:04/mi
2:15:29
↑ 66↓ 880.2%
30K· 18.64 mi
9:53/mi
2:46:11
↑ 181↓ 1480.2%
20M
10:09/mi
2:59:58
↑ 64↓ 500.2%
21M
11:09/mi
3:11:07
↑ 106↓ 241.6%
35K· 21.75 mi
10:03/mi
3:18:38
↑ 17↓ 861.7%
23M
10:42/mi
3:32:02
↑ 23↓ 630.6%
24M
10:29/mi
3:42:31
↓ 821.3%
40K· 24.85 mi
10:44/mi
3:51:42
↓ 200.3%
25.2M
12:05/mi
3:55:52
↑ 13↓ 160.2%
Finish· 26.22 mi
10:14/mi
4:06:18
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:53:31
Pace8:40 /mi
2nd Half
Distance13.11 mi
Time2:12:47
Pace10:08 /mi
📊Positive Split: 17.0% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:48:5527:358:5327:35
8:53
-
10K
6.21 mi12:15:3154:118:4326:36
8:34
-0:19
15K
9.32 mi12:41:531:20:338:3926:22
8:29
-0:05
20K
12.43 mi13:08:551:47:358:3927:02
8:42
+0:13
Half
13.11 mi13:14:511:53:318:405:56
8:42
0:00
25K
15.53 mi13:36:492:15:298:4321:58
9:04
+0:22
30K
18.64 mi14:07:312:46:118:5530:42
9:53
+0:49
20M
20.00 mi14:21:182:59:589:0013:47
10:09
+0:16
21M
21.00 mi14:32:273:11:079:0611:09
11:09
+1:00
35K
21.75 mi14:39:583:18:389:087:31
10:03
-1:06
23M
23.00 mi14:53:223:32:029:1313:24
10:42
+0:39
24M
24.00 mi15:03:513:42:319:1610:29
10:29
-0:13
40K
24.85 mi15:13:023:51:429:199:11
10:44
+0:15
25.2M
25.20 mi15:17:123:55:529:224:10
12:05
+1:21
Finish
26.22 mi15:27:384:06:189:2410:26
10:14
-1:51

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

8:29 /mi

Average Pace

9:24 /mi

Slowest Pace

12:05 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:15:29

55% of race

Time at Steady Pace

1:12:55

30% of race

Time at Slower Pace

37:54

15% of race

Average Pace: 9:24 /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 mi11:48:5527:358:5327:35
8:53
#21900
10K
6.21 mi12:15:3154:118:4326:36
8:34
#21002
15K
9.32 mi12:41:531:20:338:3926:22
8:29
#20428
20K
12.43 mi13:08:551:47:358:3927:02
8:42
#20175
Half
13.11 mi13:14:511:53:318:405:56
8:42
#20175
25K
15.53 mi13:36:492:15:298:4321:58
9:04
#20188
30K
18.64 mi14:07:312:46:118:5530:42
9:53
#20449
20M
20.00 mi14:21:182:59:589:0013:47
10:09
#20545
21M
21.00 mi14:32:273:11:079:0611:09
11:09
#20646
35K
21.75 mi14:39:583:18:389:087:31
10:03
#20725
23M
23.00 mi14:53:223:32:029:1313:24
10:42
#20909
24M
24.00 mi15:03:513:42:319:1610:29
10:29
#21006
40K
24.85 mi15:13:023:51:429:199:11
10:44
#21097
25.2M
25.20 mi15:17:123:55:529:224:10
12:05
#21129
Finish
26.22 mi15:27:384:06:189:2410:26
10:14
#21237
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF45-49Seg. OverallSeg. FemalesSeg. F45-49
5K3.11 mi3.11 mi219008572857219262(Top 68%)7042(Top 58%)7042(Top 388%)
10K6.21 mi3.10 mi21002+8988056+5168056+51620165(Top 71%)7557(Top 62%)7557(Top 417%)
15K9.32 mi3.11 mi20428+5747716+3407716+34019262(Top 68%)7042(Top 58%)7042(Top 388%)
20K12.43 mi3.11 mi20175+2537576+1407576+14019434(Top 68%)7164(Top 59%)7164(Top 395%)
Half13.11 mi0.68 mi201757577-17577-120418(Top 72%)7719(Top 63%)7719(Top 426%)
25K15.53 mi2.42 mi20188-137596-197596-1920190(Top 71%)7644(Top 63%)7644(Top 422%)
30K18.64 mi3.11 mi20449-2617790-1947790-19421247(Top 75%)8370(Top 68%)8370(Top 462%)
20M20.00 mi1.36 mi20545-967851-617851-6121419(Top 75%)8586(Top 70%)8586(Top 474%)
21M21.00 mi1.00 mi20646-1017931-807931-8021777(Top 77%)8849(Top 72%)8849(Top 488%)
35K21.75 mi0.75 mi20725-797984-537984-5322047(Top 78%)9055(Top 74%)9055(Top 499%)
23M23.00 mi1.25 mi20909-1848116-1328116-13222528(Top 79%)9356(Top 77%)9356(Top 516%)
24M24.00 mi1.00 mi21006-978191-758191-7522776(Top 80%)9523(Top 78%)9523(Top 525%)
40K24.85 mi0.85 mi21097-918254-638254-6322555(Top 79%)9478(Top 78%)9478(Top 523%)
25.2M25.20 mi0.35 mi21129-328280-268280-2623420(Top 82%)9866(Top 81%)9866(Top 544%)
Finish26.22 mi1.02 mi21237-1088352-728352-7223639(Top 83%)9993(Top 82%)9993(Top 551%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 68%
×21story building
+97ft-345ft

Overall

19262

Females

7042

F45-49

7042

5K→10K

3.1 - 6.2 mi

Top 71%
×5story building
+79ft-138ft

Overall

20165

Females

7557

F45-49

7557

10K→15K

6.2 - 9.3 mi

Top 68%
×3story building
+67ft-78ft

Overall

19262

Females

7042

F45-49

7042

15K→20K

9.3 - 12.4 mi

Top 68%
×5story building
+106ft-86ft

Overall

19434

Females

7164

F45-49

7164

20K→Half

12.4 - 13.1 mi

Top 72%
×2story building
+19ft-37ft

Overall

20418

Females

7719

F45-49

7719

Half→25K

13.1 - 15.5 mi

Top 71%
×4story building
+66ft-88ft

Overall

20190

Females

7644

F45-49

7644

25K→30K

15.5 - 18.6 mi

Top 75%
×9story building
+181ft-148ft

Overall

21247

Females

8370

F45-49

8370

30K→20M

18.6 - 20.0 mi

Top 75%
×5story building
+64ft-50ft

Overall

21419

Females

8586

F45-49

8586

20M→21M

20.0 - 21.0 mi

Top 77%
×8story building
+106ft-24ft

Overall

21777

Females

8849

F45-49

8849

21M→35K

21.0 - 21.8 mi

Top 78%
×7story building
+17ft-86ft

Overall

22047

Females

9055

F45-49

9055

35K→23M

21.8 - 23.0 mi

Top 79%
×5story building
+23ft-63ft

Overall

22528

Females

9356

F45-49

9356

23M→24M

23.0 - 24.0 mi

Top 80%
×6story building
+12ft-82ft

Overall

22776

Females

9523

F45-49

9523

24M→40K

24.0 - 24.9 mi

Top 79%
×1story
+6ft-20ft

Overall

22555

Females

9478

F45-49

9478

40K→25.2M

24.9 - 25.2 mi

Top 82%
×1story
+13ft-16ft

Overall

23420

Females

9866

F45-49

9866

25.2M→Finish

25.2 - 26.2 mi

Top 83%
×2story building
+22ft-21ft

Overall

23639

Females

9993

F45-49

9993

Passing Analysis

Category:
Athletes Passed
2494
Passed By
1831
Net Change
+663
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#21900
5K → 10K93537+898#21900#21002
10K → 15K60329+574#21002#20428
15K → 20K31360+253#20428#20175
20K → Half34340#20175#20175
Half → 25K155168-13#20175#20188
25K → 30K158419-261#20188#20449
30K → 20M73169-96#20449#20545
20M → 21M61162-101#20545#20646
21M → 35K30109-79#20646#20725
35K → 23M51235-184#20725#20909
23M → 24M31128-97#20909#21006
24M → 40K22113-91#21006#21097
40K → 25.2M1345-32#21097#21129
25.2M → Finish15123-108#21129#21237
TOTALS24941831+663
📊

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