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BOSTON MARATHON 2025

Katherine Nelson

Bib: 16329•F

FL

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 45%
Gender (Female)
#0 / 12228
Top 30%
Division (F18-39)
#0 / 5469
Top 48%
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
7:06/mi
22:04
↑ 97↓ 3451.5%
10K· 6.21 mi
7:17/mi
44:41
↑ 79↓ 1380.4%
15K· 9.32 mi
7:24/mi
1:07:40
↑ 67↓ 78
20K· 12.43 mi
7:44/mi
1:31:41
↑ 106↓ 860.1%
Half· 13.11 mi
9:59/mi
1:38:30
↑ 19↓ 370.5%
25K· 15.53 mi
7:46/mi
1:57:19
↑ 66↓ 880.2%
30K· 18.64 mi
8:16/mi
2:23:01
↑ 181↓ 1480.2%
20M
8:23/mi
2:34:24
↑ 64↓ 500.2%
21M
8:42/mi
2:43:06
↑ 106↓ 241.6%
35K· 21.75 mi
8:33/mi
2:49:30
↑ 17↓ 861.7%
23M
10:03/mi
3:02:05
↑ 23↓ 630.6%
24M
8:18/mi
3:10:23
↓ 821.3%
40K· 24.85 mi
8:11/mi
3:17:23
↓ 200.3%
25.2M
9:14/mi
3:20:34
↑ 13↓ 160.2%
Finish· 26.22 mi
7:55/mi
3:28:38
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:38:30
Pace7:31 /mi
2nd Half
Distance13.11 mi
Time1:50:08
Pace8:24 /mi
📊Positive Split: 11.8% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:56:4422:047:0622:04
7:06
-
10K
6.21 mi11:19:2144:417:1122:37
7:17
+0:11
15K
9.32 mi11:42:201:07:407:1622:59
7:24
+0:07
20K
12.43 mi12:06:211:31:417:2324:01
7:44
+0:20
Half
13.11 mi12:13:101:38:307:316:49
9:59
+2:15
25K
15.53 mi12:31:591:57:197:3318:49
7:46
-2:13
30K
18.64 mi12:57:412:23:017:4025:42
8:16
+0:30
20M
20.00 mi13:09:042:34:247:4311:23
8:23
+0:07
21M
21.00 mi13:17:462:43:067:468:42
8:42
+0:19
35K
21.75 mi13:24:102:49:307:486:24
8:33
-0:09
23M
23.00 mi13:36:453:02:057:5512:35
10:03
+1:30
24M
24.00 mi13:45:033:10:237:568:18
8:18
-1:45
40K
24.85 mi13:52:033:17:237:567:00
8:11
-0:07
25.2M
25.20 mi13:55:143:20:347:583:11
9:14
+1:03
Finish
26.22 mi14:03:183:28:387:588:04
7:55
-1:19

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

7:06 /mi

Average Pace

7:58 /mi

Slowest Pace

10:03 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:50:30

53% of race

Time at Steady Pace

1:06:51

32% of race

Time at Slower Pace

31:17

15% of race

Average Pace: 7:57 /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 mi10:56:4422:047:0622:04
7:06
#8683
10K
6.21 mi11:19:2144:417:1122:37
7:17
#9400
15K
9.32 mi11:42:201:07:407:1622:59
7:24
#9857
20K
12.43 mi12:06:211:31:417:2324:01
7:44
#10569
Half
13.11 mi12:13:101:38:307:316:49
9:59
#11751
25K
15.53 mi12:31:591:57:197:3318:49
7:46
#11790
30K
18.64 mi12:57:412:23:017:4025:42
8:16
#12017
20M
20.00 mi13:09:042:34:247:4311:23
8:23
#12082
21M
21.00 mi13:17:462:43:067:468:42
8:42
#12027
35K
21.75 mi13:24:102:49:307:486:24
8:33
#12179
23M
23.00 mi13:36:453:02:057:5512:35
10:03
#12895
24M
24.00 mi13:45:033:10:237:568:18
8:18
#12903
40K
24.85 mi13:52:033:17:237:567:00
8:11
#12832
25.2M
25.20 mi13:55:143:20:347:583:11
9:14
#12828
Finish
26.22 mi14:03:183:28:387:588:04
7:55
#12798
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi86831238123810881(Top 38%)2319(Top 19%)2319(Top 42%)
10K6.21 mi3.10 mi9400-7171534-2961534-29610205(Top 36%)1917(Top 16%)1917(Top 35%)
15K9.32 mi3.11 mi9857-4571779-2451779-24510881(Top 38%)2319(Top 19%)2319(Top 42%)
20K12.43 mi3.11 mi10569-7122135-3562135-35612678(Top 45%)3373(Top 28%)3373(Top 62%)
Half13.11 mi0.68 mi11751-11822740-6052740-60524818(Top 87%)10168(Top 83%)10168(Top 186%)
25K15.53 mi2.42 mi11790-392810-702810-7012055(Top 42%)3149(Top 26%)3149(Top 58%)
30K18.64 mi3.11 mi12017-2273004-1943004-19413315(Top 47%)4006(Top 33%)4006(Top 73%)
20M20.00 mi1.36 mi12082-653076-723076-7213006(Top 46%)3977(Top 33%)3977(Top 73%)
21M21.00 mi1.00 mi12027+553082-63082-611699(Top 41%)3449(Top 28%)3449(Top 63%)
35K21.75 mi0.75 mi12179-1523199-1173199-11715805(Top 56%)5662(Top 46%)5662(Top 104%)
23M23.00 mi1.25 mi12895-7163604-4053604-40520656(Top 73%)8381(Top 69%)8381(Top 153%)
24M24.00 mi1.00 mi12903-83650-463650-4613276(Top 47%)4451(Top 36%)4451(Top 81%)
40K24.85 mi0.85 mi12832+713638+123638+1211505(Top 41%)3657(Top 30%)3657(Top 67%)
25.2M25.20 mi0.35 mi12828+43648-103648-1013130(Top 46%)4549(Top 37%)4549(Top 83%)
Finish26.22 mi1.02 mi12798+303651-33651-312318(Top 43%)4088(Top 33%)4088(Top 75%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 38%
×21story building
+97ft-345ft

Overall

10881

Females

2319

F18-39

2319

5K→10K

3.1 - 6.2 mi

Top 36%
×5story building
+79ft-138ft

Overall

10205

Females

1917

F18-39

1917

10K→15K

6.2 - 9.3 mi

Top 38%
×3story building
+67ft-78ft

Overall

10881

Females

2319

F18-39

2319

15K→20K

9.3 - 12.4 mi

Top 45%
×5story building
+106ft-86ft

Overall

12678

Females

3373

F18-39

3373

20K→Half

12.4 - 13.1 mi

Top 87%
×2story building
+19ft-37ft

Overall

24818

Females

10168

F18-39

10168

Half→25K

13.1 - 15.5 mi

Top 42%
×4story building
+66ft-88ft

Overall

12055

Females

3149

F18-39

3149

25K→30K

15.5 - 18.6 mi

Top 47%
×9story building
+181ft-148ft

Overall

13315

Females

4006

F18-39

4006

30K→20M

18.6 - 20.0 mi

Top 46%
×5story building
+64ft-50ft

Overall

13006

Females

3977

F18-39

3977

20M→21M

20.0 - 21.0 mi

Top 41%
×8story building
+106ft-24ft

Overall

11699

Females

3449

F18-39

3449

21M→35K

21.0 - 21.8 mi

Top 56%
×7story building
+17ft-86ft

Overall

15805

Females

5662

F18-39

5662

35K→23M

21.8 - 23.0 mi

Top 73%
×5story building
+23ft-63ft

Overall

20656

Females

8381

F18-39

8381

23M→24M

23.0 - 24.0 mi

Top 47%
×6story building
+12ft-82ft

Overall

13276

Females

4451

F18-39

4451

24M→40K

24.0 - 24.9 mi

Top 41%
×1story
+6ft-20ft

Overall

11505

Females

3657

F18-39

3657

40K→25.2M

24.9 - 25.2 mi

Top 46%
×1story
+13ft-16ft

Overall

13130

Females

4549

F18-39

4549

25.2M→Finish

25.2 - 26.2 mi

Top 43%
×2story building
+22ft-21ft

Overall

12318

Females

4088

F18-39

4088

Passing Analysis

Category:
Athletes Passed
1043
Passed By
5155
Net Change
-4115
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#8683
5K → 10K41758-717#8683#9400
10K → 15K60516-457#9400#9857
15K → 20K45755-712#9857#10569
20K → Half01182-1182#10569#11751
Half → 25K148187-39#11751#11790
25K → 30K172399-227#11790#12017
30K → 20M96161-65#12017#12082
20M → 21M12368+55#12082#12027
21M → 35K32184-152#12027#12179
35K → 23M20736-716#12179#12895
23M → 24M7785-8#12895#12903
24M → 40K10231+71#12903#12832
40K → 25.2M4036+4#12832#12828
25.2M → Finish8757+30#12828#12798
TOTALS10435155-4115
📊

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