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BOSTON MARATHON 2025

Rachael Merson

Bib: 30027•F

MA

0:00
0:00
/ mi
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Overall
#0 / 28404
Gender (Female)
#0 / 12228
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
10:17/mi
31:58
↑ 97↓ 3451.5%
10K· 6.21 mi
10:22/mi
1:04:10
↑ 79↓ 1380.4%
15K· 9.32 mi
10:20/mi
1:36:16
↑ 67↓ 78
20K· 12.43 mi
10:17/mi
2:08:14
↑ 106↓ 860.1%
Half· 13.11 mi
10:11/mi
2:15:11
↑ 19↓ 370.5%
25K· 15.53 mi
10:29/mi
2:40:36
↑ 66↓ 880.2%
30K· 18.64 mi
10:50/mi
3:14:15
↑ 181↓ 1480.2%
20M
10:34/mi
3:28:37
↑ 64↓ 500.2%
21M
10:56/mi
3:39:33
↑ 106↓ 241.6%
35K· 21.75 mi
8:59/mi
3:46:16
↑ 17↓ 861.7%
23M
9:13/mi
3:57:49
↑ 23↓ 630.6%
24M
8:35/mi
4:06:24
↓ 821.3%
40K· 24.85 mi
9:04/mi
4:14:09
↓ 200.3%
25.2M
9:52/mi
4:17:33
↑ 13↓ 160.2%
Finish· 26.22 mi
8:37/mi
4:26:20
↑ 22↓ 21

The Course

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Half Splits

1st Half· via Half
Distance13.11 mi
Time2:15:11
Pace10:19 /mi
2nd Half✓ Faster
Distance13.11 mi
Time2:11:09
Pace10:00 /mi
📊Negative Split: 3.0% faster second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:56:5031:5810:1731:58
10:17
-
10K
6.21 mi12:29:021:04:1010:2032:12
10:22
+0:05
15K
9.32 mi13:01:081:36:1610:2032:06
10:20
-0:02
20K
12.43 mi13:33:062:08:1410:1931:58
10:17
-0:03
Half
13.11 mi13:40:032:15:1110:196:57
10:11
-0:06
25K
15.53 mi14:05:282:40:3610:2025:25
10:29
+0:18
30K
18.64 mi14:39:073:14:1510:2533:39
10:50
+0:21
20M
20.00 mi14:53:293:28:3710:2614:22
10:34
-0:16
21M
21.00 mi15:04:253:39:3310:2710:56
10:56
+0:22
35K
21.75 mi15:11:083:46:1610:246:43
8:59
-1:57
23M
23.00 mi15:22:413:57:4910:2011:33
9:13
+0:14
24M
24.00 mi15:31:164:06:2410:168:35
8:35
-0:38
40K
24.85 mi15:39:014:14:0910:147:45
9:04
+0:29
25.2M
25.20 mi15:42:254:17:3310:133:24
9:52
+0:48
Finish
26.22 mi15:51:124:26:2010:108:47
8:37
-1:15

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

8:35 /mi

Average Pace

10:10 /mi

Slowest Pace

10:56 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

46:47

18% of race

Time at Steady Pace

2:54:58

66% of race

Time at Slower Pace

44:35

17% of race

Average Pace: 10:09 /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 mi11:56:5031:5810:1731:58
10:17
#26282
10K
6.21 mi12:29:021:04:1010:2032:12
10:22
#26134
15K
9.32 mi13:01:081:36:1610:2032:06
10:20
#25962
20K
12.43 mi13:33:062:08:1410:1931:58
10:17
#25642
Half
13.11 mi13:40:032:15:1110:196:57
10:11
#25626
25K
15.53 mi14:05:282:40:3610:2025:25
10:29
#25404
30K
18.64 mi14:39:073:14:1510:2533:39
10:50
#25085
20M
20.00 mi14:53:293:28:3710:2614:22
10:34
#24939
21M
21.00 mi15:04:253:39:3310:2710:56
10:56
#24775
35K
21.75 mi15:11:083:46:1610:246:43
8:59
#24636
23M
23.00 mi15:22:413:57:4910:2011:33
9:13
#24341
24M
24.00 mi15:31:164:06:2410:168:35
8:35
#24086
40K
24.85 mi15:39:014:14:0910:147:45
9:04
#23880
25.2M
25.20 mi15:42:254:17:3310:133:24
9:52
#23794
Finish
26.22 mi15:51:124:26:2010:108:47
8:37
#23629
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi26282109091090925652(Top 90%)10588(Top 87%)10588(Top 194%)
10K6.21 mi3.10 mi26134+14810844+6510844+6526035(Top 92%)10809(Top 88%)10809(Top 198%)
15K9.32 mi3.11 mi25962+17210755+8910755+8925652(Top 90%)10588(Top 87%)10588(Top 194%)
20K12.43 mi3.11 mi25642+32010586+16910586+16924809(Top 87%)10155(Top 83%)10155(Top 186%)
Half13.11 mi0.68 mi25626+1610574+1210574+1225238(Top 89%)10394(Top 85%)10394(Top 190%)
25K15.53 mi2.42 mi25404+22210474+10010474+10024361(Top 86%)9939(Top 81%)9939(Top 182%)
30K18.64 mi3.11 mi25085+31910325+14910325+14923682(Top 83%)9694(Top 79%)9694(Top 177%)
20M20.00 mi1.36 mi24939+14610263+6210263+6222631(Top 80%)9223(Top 75%)9223(Top 169%)
21M21.00 mi1.00 mi24775+16410178+8510178+8521228(Top 75%)8577(Top 70%)8577(Top 157%)
35K21.75 mi0.75 mi24636+13910114+6410114+6418179(Top 64%)7015(Top 57%)7015(Top 128%)
23M23.00 mi1.25 mi24341+2959971+1439971+14317482(Top 62%)6720(Top 55%)6720(Top 123%)
24M24.00 mi1.00 mi24086+2559862+1099862+10915115(Top 53%)5456(Top 45%)5456(Top 100%)
40K24.85 mi0.85 mi23880+2069756+1069756+10616733(Top 59%)6451(Top 53%)6451(Top 118%)
25.2M25.20 mi0.35 mi23794+869721+359721+3516503(Top 58%)6364(Top 52%)6364(Top 116%)
Finish26.22 mi1.02 mi23629+1659655+669655+6617018(Top 60%)6586(Top 54%)6586(Top 120%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 90%
×21story building
+97ft-345ft

Overall

25652

Females

10588

F18-39

10588

5K→10K

3.1 - 6.2 mi

Top 92%
×5story building
+79ft-138ft

Overall

26035

Females

10809

F18-39

10809

10K→15K

6.2 - 9.3 mi

Top 90%
×3story building
+67ft-78ft

Overall

25652

Females

10588

F18-39

10588

15K→20K

9.3 - 12.4 mi

Top 87%
×5story building
+106ft-86ft

Overall

24809

Females

10155

F18-39

10155

20K→Half

12.4 - 13.1 mi

Top 89%
×2story building
+19ft-37ft

Overall

25238

Females

10394

F18-39

10394

Half→25K

13.1 - 15.5 mi

Top 86%
×4story building
+66ft-88ft

Overall

24361

Females

9939

F18-39

9939

25K→30K

15.5 - 18.6 mi

Top 83%
×9story building
+181ft-148ft

Overall

23682

Females

9694

F18-39

9694

30K→20M

18.6 - 20.0 mi

Top 80%
×5story building
+64ft-50ft

Overall

22631

Females

9223

F18-39

9223

20M→21M

20.0 - 21.0 mi

Top 75%
×8story building
+106ft-24ft

Overall

21228

Females

8577

F18-39

8577

21M→35K

21.0 - 21.8 mi

Top 64%
×7story building
+17ft-86ft

Overall

18179

Females

7015

F18-39

7015

35K→23M

21.8 - 23.0 mi

Top 62%
×5story building
+23ft-63ft

Overall

17482

Females

6720

F18-39

6720

23M→24M

23.0 - 24.0 mi

Top 53%
×6story building
+12ft-82ft

Overall

15115

Females

5456

F18-39

5456

24M→40K

24.0 - 24.9 mi

Top 59%
×1story
+6ft-20ft

Overall

16733

Females

6451

F18-39

6451

40K→25.2M

24.9 - 25.2 mi

Top 58%
×1story
+13ft-16ft

Overall

16503

Females

6364

F18-39

6364

25.2M→Finish

25.2 - 26.2 mi

Top 60%
×2story building
+22ft-21ft

Overall

17018

Females

6586

F18-39

6586

Passing Analysis

Category:
Athletes Passed
2838
Passed By
185
Net Change
+2653
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#26282
5K → 10K23991+148#26282#26134
10K → 15K21947+172#26134#25962
15K → 20K3255+320#25962#25642
20K → Half237+16#25642#25626
Half → 25K23816+222#25626#25404
25K → 30K3278+319#25404#25085
30K → 20M1526+146#25085#24939
20M → 21M1695+164#24939#24775
21M → 35K1390+139#24775#24636
35K → 23M2950+295#24636#24341
23M → 24M2550+255#24341#24086
24M → 40K2060+206#24086#23880
40K → 25.2M860+86#23880#23794
25.2M → Finish1650+165#23794#23629
TOTALS2838185+2653
📊

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