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BOSTON MARATHON 2025

Julia Williams

Bib: 27400•F

NH

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
7:06/mi
22:04
↑ 97↓ 3451.5%
10K· 6.21 mi
7:23/mi
44:59
↑ 79↓ 1380.4%
15K· 9.32 mi
7:42/mi
1:08:54
↑ 67↓ 78
20K· 12.43 mi
8:17/mi
1:34:38
↑ 106↓ 860.1%
Half· 13.11 mi
8:27/mi
1:40:24
↑ 19↓ 370.5%
25K· 15.53 mi
9:08/mi
2:02:32
↑ 66↓ 880.2%
30K· 18.64 mi
9:52/mi
2:33:12
↑ 181↓ 1480.2%
20M
10:04/mi
2:46:53
↑ 64↓ 500.2%
21M
12:41/mi
2:59:34
↑ 106↓ 241.6%
35K· 21.75 mi
9:24/mi
3:06:36
↑ 17↓ 861.7%
23M
11:40/mi
3:21:12
↑ 23↓ 630.6%
24M
11:32/mi
3:32:44
↓ 821.3%
40K· 24.85 mi
12:00/mi
3:43:00
↓ 200.3%
25.2M
12:31/mi
3:47:19
↑ 13↓ 160.2%
Finish· 26.22 mi
9:16/mi
3:56:46
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:40:24
Pace7:40 /mi
2nd Half
Distance13.11 mi
Time2:16:22
Pace10:24 /mi
📊Positive Split: 35.8% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:37:3822:047:0622:04
7:06
-
10K
6.21 mi12:00:3344:597:1422:55
7:23
+0:17
15K
9.32 mi12:24:281:08:547:2423:55
7:42
+0:19
20K
12.43 mi12:50:121:34:387:3725:44
8:17
+0:35
Half
13.11 mi12:55:581:40:247:405:46
8:27
+0:10
25K
15.53 mi13:18:062:02:327:5322:08
9:08
+0:41
30K
18.64 mi13:48:462:33:128:1330:40
9:52
+0:44
20M
20.00 mi14:02:272:46:538:2113:41
10:04
+0:12
21M
21.00 mi14:15:082:59:348:3312:41
12:41
+2:37
35K
21.75 mi14:22:103:06:368:357:02
9:24
-3:17
23M
23.00 mi14:36:463:21:128:4514:36
11:40
+2:16
24M
24.00 mi14:48:183:32:448:5211:32
11:32
-0:08
40K
24.85 mi14:58:343:43:008:5810:16
12:00
+0:28
25.2M
25.20 mi15:02:533:47:199:014:19
12:31
+0:31
Finish
26.22 mi15:12:203:56:469:029:27
9:16
-3:15

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

7:06 /mi

Average Pace

9:02 /mi

Slowest Pace

12:41 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:40:24

42% of race

Time at Steady Pace

1:22:58

35% of race

Time at Slower Pace

53:24

23% of race

Average Pace: 9:02 /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 mi11:37:3822:047:0622:04
7:06
#8687
10K
6.21 mi12:00:3344:597:1422:55
7:23
#9807
15K
9.32 mi12:24:281:08:547:2423:55
7:42
#11001
20K
12.43 mi12:50:121:34:387:3725:44
8:17
#12623
Half
13.11 mi12:55:581:40:247:405:46
8:27
#12997
25K
15.53 mi13:18:062:02:327:5322:08
9:08
#14624
30K
18.64 mi13:48:462:33:128:1330:40
9:52
#16340
20M
20.00 mi14:02:272:46:538:2113:41
10:04
#16795
21M
21.00 mi14:15:082:59:348:3312:41
12:41
#17703
35K
21.75 mi14:22:103:06:368:357:02
9:24
#17805
23M
23.00 mi14:36:463:21:128:4514:36
11:40
#18570
24M
24.00 mi14:48:183:32:448:5211:32
11:32
#19109
40K
24.85 mi14:58:343:43:008:5810:16
12:00
#19523
25.2M
25.20 mi15:02:533:47:199:014:19
12:31
#19675
Finish
26.22 mi15:12:203:56:469:029:27
9:16
#19698
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi86871242124213508(Top 48%)3746(Top 31%)3746(Top 68%)
10K6.21 mi3.10 mi9807-11201715-4731715-47310993(Top 39%)2304(Top 19%)2304(Top 42%)
15K9.32 mi3.11 mi11001-11942320-6052320-60513508(Top 48%)3746(Top 31%)3746(Top 68%)
20K12.43 mi3.11 mi12623-16223220-9003220-90016850(Top 59%)5694(Top 47%)5694(Top 104%)
Half13.11 mi0.68 mi12997-3743448-2283448-22818964(Top 67%)6887(Top 56%)6887(Top 126%)
25K15.53 mi2.42 mi14624-16274409-9614409-96120488(Top 72%)7802(Top 64%)7802(Top 143%)
30K18.64 mi3.11 mi16340-17165436-10275436-102721219(Top 75%)8350(Top 68%)8350(Top 153%)
20M20.00 mi1.36 mi16795-4555715-2795715-27921187(Top 75%)8462(Top 69%)8462(Top 155%)
21M21.00 mi1.00 mi17703-9086270-5556270-55524653(Top 87%)10374(Top 85%)10374(Top 190%)
35K21.75 mi0.75 mi17805-1026335-656335-6519970(Top 70%)7961(Top 65%)7961(Top 146%)
23M23.00 mi1.25 mi18570-7656807-4726807-47224535(Top 86%)10362(Top 85%)10362(Top 189%)
24M24.00 mi1.00 mi19109-5397127-3207127-32024957(Top 88%)10605(Top 87%)10605(Top 194%)
40K24.85 mi0.85 mi19523-4147390-2637390-26324945(Top 88%)10645(Top 87%)10645(Top 195%)
25.2M25.20 mi0.35 mi19675-1527492-1027492-10224250(Top 85%)10278(Top 84%)10278(Top 188%)
Finish26.22 mi1.02 mi19698-237518-267518-2620285(Top 71%)8283(Top 68%)8283(Top 151%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 48%
×21story building
+97ft-345ft

Overall

13508

Females

3746

F18-39

3746

5K→10K

3.1 - 6.2 mi

Top 39%
×5story building
+79ft-138ft

Overall

10993

Females

2304

F18-39

2304

10K→15K

6.2 - 9.3 mi

Top 48%
×3story building
+67ft-78ft

Overall

13508

Females

3746

F18-39

3746

15K→20K

9.3 - 12.4 mi

Top 59%
×5story building
+106ft-86ft

Overall

16850

Females

5694

F18-39

5694

20K→Half

12.4 - 13.1 mi

Top 67%
×2story building
+19ft-37ft

Overall

18964

Females

6887

F18-39

6887

Half→25K

13.1 - 15.5 mi

Top 72%
×4story building
+66ft-88ft

Overall

20488

Females

7802

F18-39

7802

25K→30K

15.5 - 18.6 mi

Top 75%
×9story building
+181ft-148ft

Overall

21219

Females

8350

F18-39

8350

30K→20M

18.6 - 20.0 mi

Top 75%
×5story building
+64ft-50ft

Overall

21187

Females

8462

F18-39

8462

20M→21M

20.0 - 21.0 mi

Top 87%
×8story building
+106ft-24ft

Overall

24653

Females

10374

F18-39

10374

21M→35K

21.0 - 21.8 mi

Top 70%
×7story building
+17ft-86ft

Overall

19970

Females

7961

F18-39

7961

35K→23M

21.8 - 23.0 mi

Top 86%
×5story building
+23ft-63ft

Overall

24535

Females

10362

F18-39

10362

23M→24M

23.0 - 24.0 mi

Top 88%
×6story building
+12ft-82ft

Overall

24957

Females

10605

F18-39

10605

24M→40K

24.0 - 24.9 mi

Top 88%
×1story
+6ft-20ft

Overall

24945

Females

10645

F18-39

10645

40K→25.2M

24.9 - 25.2 mi

Top 85%
×1story
+13ft-16ft

Overall

24250

Females

10278

F18-39

10278

25.2M→Finish

25.2 - 26.2 mi

Top 71%
×2story building
+22ft-21ft

Overall

20285

Females

8283

F18-39

8283

Passing Analysis

Category:
Athletes Passed
290
Passed By
11298
Net Change
-11011
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#8687
5K → 10K261145-1120#8687#9807
10K → 15K291221-1194#9807#11001
15K → 20K201642-1622#11001#12623
20K → Half2376-374#12623#12997
Half → 25K211648-1627#12997#14624
25K → 30K201736-1716#14624#16340
30K → 20M26481-455#16340#16795
20M → 21M18926-908#16795#17703
21M → 35K38140-102#17703#17805
35K → 23M17782-765#17805#18570
23M → 24M3542-539#18570#19109
24M → 40K16430-414#19109#19523
40K → 25.2M6158-152#19523#19675
25.2M → Finish4871-23#19675#19698
TOTALS29011298-11011
📊

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