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BOSTON MARATHON 2025

Robyn Mertz

Bib: 17309•F

NY

0:00
0:00
/ mi
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Overall
#0 / 28404
Gender (Female)
#0 / 12228
Top 44%
Division (F18-39)
#0 / 5469
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
7:40/mi
23:49
↑ 97↓ 3451.5%
10K· 6.21 mi
7:35/mi
47:22
↑ 79↓ 1380.4%
15K· 9.32 mi
7:51/mi
1:11:45
↑ 67↓ 78
20K· 12.43 mi
7:58/mi
1:36:30
↑ 106↓ 860.1%
Half· 13.11 mi
7:43/mi
1:41:46
↑ 19↓ 370.5%
25K· 15.53 mi
8:20/mi
2:01:59
↑ 66↓ 880.2%
30K· 18.64 mi
8:46/mi
2:29:12
↑ 181↓ 1480.2%
20M
9:03/mi
2:41:30
↑ 64↓ 500.2%
21M
10:07/mi
2:51:37
↑ 106↓ 241.6%
35K· 21.75 mi
9:31/mi
2:58:44
↑ 17↓ 861.7%
23M
9:53/mi
3:11:07
↑ 23↓ 630.6%
24M
9:28/mi
3:20:35
↓ 821.3%
40K· 24.85 mi
9:37/mi
3:28:48
↓ 200.3%
25.2M
9:57/mi
3:32:14
↑ 13↓ 160.2%
Finish· 26.22 mi
8:07/mi
3:40:30
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:41:46
Pace7:46 /mi
2nd Half
Distance13.11 mi
Time1:58:44
Pace9:03 /mi
📊Positive Split: 16.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:14:1823:497:4023:49
7:40
-
10K
6.21 mi11:37:5147:227:3723:33
7:35
-0:05
15K
9.32 mi12:02:141:11:457:4224:23
7:51
+0:16
20K
12.43 mi12:26:591:36:307:4624:45
7:58
+0:07
Half
13.11 mi12:32:151:41:467:465:16
7:43
-0:15
25K
15.53 mi12:52:282:01:597:5120:13
8:20
+0:37
30K
18.64 mi13:19:412:29:128:0027:13
8:46
+0:26
20M
20.00 mi13:31:592:41:308:0412:18
9:03
+0:17
21M
21.00 mi13:42:062:51:378:1010:07
10:07
+1:04
35K
21.75 mi13:49:132:58:448:137:07
9:31
-0:36
23M
23.00 mi14:01:363:11:078:1912:23
9:53
+0:22
24M
24.00 mi14:11:043:20:358:219:28
9:28
-0:25
40K
24.85 mi14:19:173:28:488:248:13
9:37
+0:09
25.2M
25.20 mi14:22:433:32:148:253:26
9:57
+0:20
Finish
26.22 mi14:30:593:40:308:258:16
8:07
-1:50

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

7:35 /mi

Average Pace

8:25 /mi

Slowest Pace

10:07 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:50:02

50% of race

Time at Steady Pace

59:44

27% of race

Time at Slower Pace

50:44

23% of race

Average Pace: 8:25 /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 mi11:14:1823:497:4023:49
7:40
#13680
10K
6.21 mi11:37:5147:227:3723:33
7:35
#13254
15K
9.32 mi12:02:141:11:457:4224:23
7:51
#13730
20K
12.43 mi12:26:591:36:307:4624:45
7:58
#13954
Half
13.11 mi12:32:151:41:467:465:16
7:43
#13942
25K
15.53 mi12:52:282:01:597:5120:13
8:20
#14331
30K
18.64 mi13:19:412:29:128:0027:13
8:46
#14770
20M
20.00 mi13:31:592:41:308:0412:18
9:03
#14945
21M
21.00 mi13:42:062:51:378:1010:07
10:07
#15195
35K
21.75 mi13:49:132:58:448:137:07
9:31
#15451
23M
23.00 mi14:01:363:11:078:1912:23
9:53
#15743
24M
24.00 mi14:11:043:20:358:219:28
9:28
#15955
40K
24.85 mi14:19:173:28:488:248:13
9:37
#16089
25.2M
25.20 mi14:22:433:32:148:253:26
9:57
#16085
Finish
26.22 mi14:30:593:40:308:258:16
8:07
#15997
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi136803700370014815(Top 52%)4487(Top 37%)4487(Top 82%)
10K6.21 mi3.10 mi13254+4263499+2013499+20112864(Top 45%)3295(Top 27%)3295(Top 60%)
15K9.32 mi3.11 mi13730-4763816-3173816-31714815(Top 52%)4487(Top 37%)4487(Top 82%)
20K12.43 mi3.11 mi13954-2243978-1623978-16214687(Top 52%)4480(Top 37%)4480(Top 82%)
Half13.11 mi0.68 mi13942+123977+13977+113680(Top 48%)3902(Top 32%)3902(Top 71%)
25K15.53 mi2.42 mi14331-3894233-2564233-25616177(Top 57%)5414(Top 44%)5414(Top 99%)
30K18.64 mi3.11 mi14770-4394542-3094542-30916364(Top 58%)5666(Top 46%)5666(Top 104%)
20M20.00 mi1.36 mi14945-1754664-1224664-12217074(Top 60%)6176(Top 51%)6176(Top 113%)
21M21.00 mi1.00 mi15195-2504833-1694833-16918731(Top 66%)7189(Top 59%)7189(Top 131%)
35K21.75 mi0.75 mi15451-2565002-1695002-16920381(Top 72%)8172(Top 67%)8172(Top 149%)
23M23.00 mi1.25 mi15743-2925218-2165218-21620124(Top 71%)8114(Top 66%)8114(Top 148%)
24M24.00 mi1.00 mi15955-2125353-1355353-13519512(Top 69%)7826(Top 64%)7826(Top 143%)
40K24.85 mi0.85 mi16089-1345458-1055458-10519131(Top 67%)7693(Top 63%)7693(Top 141%)
25.2M25.20 mi0.35 mi16085+45458545816851(Top 59%)6505(Top 53%)6505(Top 119%)
Finish26.22 mi1.02 mi15997+885428+305428+3013716(Top 48%)4814(Top 39%)4814(Top 88%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 52%
×21story building
+97ft-345ft

Overall

14815

Females

4487

F18-39

4487

5K→10K

3.1 - 6.2 mi

Top 45%
×5story building
+79ft-138ft

Overall

12864

Females

3295

F18-39

3295

10K→15K

6.2 - 9.3 mi

Top 52%
×3story building
+67ft-78ft

Overall

14815

Females

4487

F18-39

4487

15K→20K

9.3 - 12.4 mi

Top 52%
×5story building
+106ft-86ft

Overall

14687

Females

4480

F18-39

4480

20K→Half

12.4 - 13.1 mi

Top 48%
×2story building
+19ft-37ft

Overall

13680

Females

3902

F18-39

3902

Half→25K

13.1 - 15.5 mi

Top 57%
×4story building
+66ft-88ft

Overall

16177

Females

5414

F18-39

5414

25K→30K

15.5 - 18.6 mi

Top 58%
×9story building
+181ft-148ft

Overall

16364

Females

5666

F18-39

5666

30K→20M

18.6 - 20.0 mi

Top 60%
×5story building
+64ft-50ft

Overall

17074

Females

6176

F18-39

6176

20M→21M

20.0 - 21.0 mi

Top 66%
×8story building
+106ft-24ft

Overall

18731

Females

7189

F18-39

7189

21M→35K

21.0 - 21.8 mi

Top 72%
×7story building
+17ft-86ft

Overall

20381

Females

8172

F18-39

8172

35K→23M

21.8 - 23.0 mi

Top 71%
×5story building
+23ft-63ft

Overall

20124

Females

8114

F18-39

8114

23M→24M

23.0 - 24.0 mi

Top 69%
×6story building
+12ft-82ft

Overall

19512

Females

7826

F18-39

7826

24M→40K

24.0 - 24.9 mi

Top 67%
×1story
+6ft-20ft

Overall

19131

Females

7693

F18-39

7693

40K→25.2M

24.9 - 25.2 mi

Top 59%
×1story
+13ft-16ft

Overall

16851

Females

6505

F18-39

6505

25.2M→Finish

25.2 - 26.2 mi

Top 48%
×2story building
+22ft-21ft

Overall

13716

Females

4814

F18-39

4814

Passing Analysis

Category:
Athletes Passed
1456
Passed By
3773
Net Change
-2317
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#13680
5K → 10K540114+426#13680#13254
10K → 15K83559-476#13254#13730
15K → 20K152376-224#13730#13954
20K → Half5038+12#13954#13942
Half → 25K88477-389#13942#14331
25K → 30K129568-439#14331#14770
30K → 20M77252-175#14770#14945
20M → 21M57307-250#14945#15195
21M → 35K19275-256#15195#15451
35K → 23M50342-292#15451#15743
23M → 24M24236-212#15743#15955
24M → 40K35169-134#15955#16089
40K → 25.2M4036+4#16089#16085
25.2M → Finish11224+88#16085#15997
TOTALS14563773-2317
📊

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