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BOSTON MARATHON 2025

Mary Slocum

Bib: 10612•F

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Top 25%
Gender (Female)
#0 / 12228
Top 8%
Masters (Masters Women)
#0 / 6759
Top 2%
Division (F60-64)
#0 / 624
Top 0.3%
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
6:56/mi
21:33
↑ 97↓ 3451.5%
10K· 6.21 mi
7:03/mi
43:26
↑ 79↓ 1380.4%
15K· 9.32 mi
7:04/mi
1:05:22
↑ 67↓ 78
20K· 12.43 mi
7:06/mi
1:27:26
↑ 106↓ 860.1%
Half· 13.11 mi
7:05/mi
1:32:16
↑ 19↓ 370.5%
25K· 15.53 mi
7:13/mi
1:49:47
↑ 66↓ 880.2%
30K· 18.64 mi
7:28/mi
2:12:58
↑ 181↓ 1480.2%
20M
7:36/mi
2:23:17
↑ 64↓ 500.2%
21M
7:58/mi
2:31:15
↑ 106↓ 241.6%
35K· 21.75 mi
7:04/mi
2:36:32
↑ 17↓ 861.7%
23M
7:30/mi
2:45:55
↑ 23↓ 630.6%
24M
7:09/mi
2:53:04
↓ 821.3%
40K· 24.85 mi
7:26/mi
2:59:25
↓ 200.3%
25.2M
8:10/mi
3:02:14
↑ 13↓ 160.2%
Finish· 26.22 mi
7:25/mi
3:09:47
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:32:16
Pace7:02 /mi
2nd Half
Distance13.11 mi
Time1:37:31
Pace7:26 /mi
📊Positive Split: 5.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:47:2021:336:5621:33
6:56
-
10K
6.21 mi11:09:1343:266:5921:53
7:03
+0:07
15K
9.32 mi11:31:091:05:227:0121:56
7:04
+0:01
20K
12.43 mi11:53:131:27:267:0222:04
7:06
+0:02
Half
13.11 mi11:58:031:32:167:024:50
7:05
-0:01
25K
15.53 mi12:15:341:49:477:0417:31
7:13
+0:08
30K
18.64 mi12:38:452:12:587:0823:11
7:28
+0:15
20M
20.00 mi12:49:042:23:177:1010:19
7:36
+0:08
21M
21.00 mi12:57:022:31:157:127:58
7:58
+0:22
35K
21.75 mi13:02:192:36:327:125:17
7:04
-0:54
23M
23.00 mi13:11:422:45:557:139:23
7:30
+0:26
24M
24.00 mi13:18:512:53:047:137:09
7:09
-0:21
40K
24.85 mi13:25:122:59:257:136:21
7:26
+0:17
25.2M
25.20 mi13:28:013:02:147:142:49
8:10
+0:44
Finish
26.22 mi13:35:343:09:477:157:33
7:25
-0:45

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

6:56 /mi

Average Pace

7:15 /mi

Slowest Pace

8:10 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:59:00

94% of race

Time at Steady Pace

10:47

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:14 /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 mi10:47:2021:336:5621:33
6:56
#7346
10K
6.21 mi11:09:1343:266:5921:53
7:03
#7786
15K
9.32 mi11:31:091:05:227:0121:56
7:04
#7848
20K
12.43 mi11:53:131:27:267:0222:04
7:06
#7730
Half
13.11 mi11:58:031:32:167:024:50
7:05
#7744
25K
15.53 mi12:15:341:49:477:0417:31
7:13
#7717
30K
18.64 mi12:38:452:12:587:0823:11
7:28
#7558
20M
20.00 mi12:49:042:23:177:1010:19
7:36
#7488
21M
21.00 mi12:57:022:31:157:127:58
7:58
#7407
35K
21.75 mi13:02:192:36:327:125:17
7:04
#7302
23M
23.00 mi13:11:422:45:557:139:23
7:30
#7191
24M
24.00 mi13:18:512:53:047:137:09
7:09
#7078
40K
24.85 mi13:25:122:59:257:136:21
7:26
#7002
25.2M
25.20 mi13:28:013:02:147:142:49
8:10
#6985
Finish
26.22 mi13:35:343:09:477:157:33
7:25
#6996
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF60-64Seg. OverallSeg. FemalesSeg. F60-64
5K3.11 mi3.11 mi73467777778051(Top 28%)1052(Top 9%)1052(Top 169%)
10K6.21 mi3.10 mi7786-440922-145922-1458253(Top 29%)1094(Top 9%)1094(Top 175%)
15K9.32 mi3.11 mi7848-62947-25947-258051(Top 28%)1052(Top 9%)1052(Top 169%)
20K12.43 mi3.11 mi7730+118925+22925+227543(Top 27%)949(Top 8%)949(Top 152%)
Half13.11 mi0.68 mi7744-14931-6931-68224(Top 29%)1162(Top 10%)1162(Top 186%)
25K15.53 mi2.42 mi7717+27946-15946-157787(Top 27%)1133(Top 9%)1133(Top 182%)
30K18.64 mi3.11 mi7558+159935+11935+117489(Top 26%)1197(Top 10%)1197(Top 192%)
20M20.00 mi1.36 mi7488+70953-18953-187636(Top 27%)1382(Top 11%)1382(Top 221%)
21M21.00 mi1.00 mi7407+81960-7960-77183(Top 25%)1372(Top 11%)1372(Top 220%)
35K21.75 mi0.75 mi7302+105951+9951+95828(Top 21%)870(Top 7%)870(Top 139%)
23M23.00 mi1.25 mi7191+111953-2953-26605(Top 23%)1226(Top 10%)1226(Top 196%)
24M24.00 mi1.00 mi7078+113947+6947+65543(Top 20%)901(Top 7%)901(Top 144%)
40K24.85 mi0.85 mi7002+76946+1946+16388(Top 22%)1287(Top 11%)1287(Top 206%)
25.2M25.20 mi0.35 mi6985+17947-1947-16902(Top 24%)1574(Top 13%)1574(Top 252%)
Finish26.22 mi1.02 mi6996-11987-40987-408560(Top 30%)2307(Top 19%)2307(Top 370%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 28%
×21story building
+97ft-345ft

Overall

8051

Females

1052

F60-64

1052

5K→10K

3.1 - 6.2 mi

Top 29%
×5story building
+79ft-138ft

Overall

8253

Females

1094

F60-64

1094

10K→15K

6.2 - 9.3 mi

Top 28%
×3story building
+67ft-78ft

Overall

8051

Females

1052

F60-64

1052

15K→20K

9.3 - 12.4 mi

Top 27%
×5story building
+106ft-86ft

Overall

7543

Females

949

F60-64

949

20K→Half

12.4 - 13.1 mi

Top 29%
×2story building
+19ft-37ft

Overall

8224

Females

1162

F60-64

1162

Half→25K

13.1 - 15.5 mi

Top 27%
×4story building
+66ft-88ft

Overall

7787

Females

1133

F60-64

1133

25K→30K

15.5 - 18.6 mi

Top 26%
×9story building
+181ft-148ft

Overall

7489

Females

1197

F60-64

1197

30K→20M

18.6 - 20.0 mi

Top 27%
×5story building
+64ft-50ft

Overall

7636

Females

1382

F60-64

1382

20M→21M

20.0 - 21.0 mi

Top 25%
×8story building
+106ft-24ft

Overall

7183

Females

1372

F60-64

1372

21M→35K

21.0 - 21.8 mi

Top 21%
×7story building
+17ft-86ft

Overall

5828

Females

870

F60-64

870

35K→23M

21.8 - 23.0 mi

Top 23%
×5story building
+23ft-63ft

Overall

6605

Females

1226

F60-64

1226

23M→24M

23.0 - 24.0 mi

Top 20%
×6story building
+12ft-82ft

Overall

5543

Females

901

F60-64

901

24M→40K

24.0 - 24.9 mi

Top 22%
×1story
+6ft-20ft

Overall

6388

Females

1287

F60-64

1287

40K→25.2M

24.9 - 25.2 mi

Top 24%
×1story
+13ft-16ft

Overall

6902

Females

1574

F60-64

1574

25.2M→Finish

25.2 - 26.2 mi

Top 30%
×2story building
+22ft-21ft

Overall

8560

Females

2307

F60-64

2307

Passing Analysis

Category:
Athletes Passed
1625
Passed By
1275
Net Change
+350
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#7346
5K → 10K71511-440#7346#7786
10K → 15K115177-62#7786#7848
15K → 20K19274+118#7848#7730
20K → Half2034-14#7730#7744
Half → 25K12497+27#7744#7717
25K → 30K264105+159#7717#7558
30K → 20M13060+70#7558#7488
20M → 21M11938+81#7488#7407
21M → 35K1138+105#7407#7302
35K → 23M14736+111#7302#7191
23M → 24M12815+113#7191#7078
24M → 40K10125+76#7078#7002
40K → 25.2M3316+17#7002#6985
25.2M → Finish6879-11#6985#6996
TOTALS16251275+350
📊

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