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BOSTON MARATHON 2025

Julie Costello

Bib: 29846•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
11:00/mi
34:12
↑ 97↓ 3451.5%
10K· 6.21 mi
11:17/mi
1:09:16
↑ 79↓ 1380.4%
15K· 9.32 mi
11:04/mi
1:43:38
↑ 67↓ 78
20K· 12.43 mi
11:10/mi
2:18:20
↑ 106↓ 860.1%
Half· 13.11 mi
10:57/mi
2:25:48
↑ 19↓ 370.5%
25K· 15.53 mi
11:21/mi
2:53:20
↑ 66↓ 880.2%
30K· 18.64 mi
12:32/mi
3:32:15
↑ 181↓ 1480.2%
20M
12:33/mi
3:49:18
↑ 64↓ 500.2%
21M
13:29/mi
4:02:47
↑ 106↓ 241.6%
35K· 21.75 mi
11:47/mi
4:11:36
↑ 17↓ 861.7%
23M
12:38/mi
4:27:25
↑ 23↓ 630.6%
24M
12:58/mi
4:40:23
↓ 821.3%
40K· 24.85 mi
12:47/mi
4:51:19
↓ 200.3%
25.2M
12:34/mi
4:55:39
↑ 13↓ 160.2%
Finish· 26.22 mi
11:07/mi
5:06:59
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:25:48
Pace11:07 /mi
2nd Half
Distance13.11 mi
Time2:41:11
Pace12:18 /mi
📊Positive Split: 10.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:55:5534:1211:0034:12
11:00
-
10K
6.21 mi12:30:591:09:1611:0935:04
11:17
+0:17
15K
9.32 mi13:05:211:43:3811:0734:22
11:04
-0:13
20K
12.43 mi13:40:032:18:2011:0834:42
11:10
+0:06
Half
13.11 mi13:47:312:25:4811:077:28
10:57
-0:13
25K
15.53 mi14:15:032:53:2011:0927:32
11:21
+0:24
30K
18.64 mi14:53:583:32:1511:2338:55
12:32
+1:11
20M
20.00 mi15:11:013:49:1811:2817:03
12:33
+0:01
21M
21.00 mi15:24:304:02:4711:3413:29
13:29
+0:56
35K
21.75 mi15:33:194:11:3611:348:49
11:47
-1:42
23M
23.00 mi15:49:084:27:2511:3815:49
12:38
+0:51
24M
24.00 mi16:02:064:40:2311:4112:58
12:58
+0:20
40K
24.85 mi16:13:024:51:1911:4310:56
12:47
-0:11
25.2M
25.20 mi16:17:224:55:3911:444:20
12:34
-0:13
Finish
26.22 mi16:28:425:06:5911:4311:20
11:07
-1:27

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

10:57 /mi

Average Pace

11:43 /mi

Slowest Pace

13:29 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:04:40

60% of race

Time at Steady Pace

8:49

3% of race

Time at Slower Pace

1:53:30

37% of race

Average Pace: 11:42 /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 mi11:55:5534:1211:0034:12
11:00
#27571
10K
6.21 mi12:30:591:09:1611:0935:04
11:17
#27478
15K
9.32 mi13:05:211:43:3811:0734:22
11:04
#27225
20K
12.43 mi13:40:032:18:2011:0834:42
11:10
#26964
Half
13.11 mi13:47:312:25:4811:077:28
10:57
#26927
25K
15.53 mi14:15:032:53:2011:0927:32
11:21
#26728
30K
18.64 mi14:53:583:32:1511:2338:55
12:32
#26634
20M
20.00 mi15:11:013:49:1811:2817:03
12:33
#26594
21M
21.00 mi15:24:304:02:4711:3413:29
13:29
#26553
35K
21.75 mi15:33:194:11:3611:348:49
11:47
#26526
23M
23.00 mi15:49:084:27:2511:3815:49
12:38
#26498
24M
24.00 mi16:02:064:40:2311:4112:58
12:58
#26542
40K
24.85 mi16:13:024:51:1911:4310:56
12:47
#26546
25.2M
25.20 mi16:17:224:55:3911:444:20
12:34
#26522
Finish
26.22 mi16:28:425:06:5911:4311:20
11:07
#26497
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi27571116881168826743(Top 94%)11224(Top 92%)11224(Top 205%)
10K6.21 mi3.10 mi27478+9311628+6011628+6027377(Top 96%)11591(Top 95%)11591(Top 212%)
15K9.32 mi3.11 mi27225+25311485+14311485+14326743(Top 94%)11224(Top 92%)11224(Top 205%)
20K12.43 mi3.11 mi26964+26111348+13711348+13726250(Top 92%)10942(Top 89%)10942(Top 200%)
Half13.11 mi0.68 mi26927+3711330+1811330+1826422(Top 93%)11077(Top 91%)11077(Top 203%)
25K15.53 mi2.42 mi26728+19911217+11311217+11325687(Top 90%)10685(Top 87%)10685(Top 195%)
30K18.64 mi3.11 mi26634+9411181+3611181+3626199(Top 92%)11059(Top 90%)11059(Top 202%)
20M20.00 mi1.36 mi26594+4011167+1411167+1425953(Top 91%)10995(Top 90%)10995(Top 201%)
21M21.00 mi1.00 mi26553+4111155+1211155+1225651(Top 90%)10882(Top 89%)10882(Top 199%)
35K21.75 mi0.75 mi26526+2711149+611149+625535(Top 90%)10869(Top 89%)10869(Top 199%)
23M23.00 mi1.25 mi26498+28111491114925961(Top 91%)11079(Top 91%)11079(Top 203%)
24M24.00 mi1.00 mi26542-4411181-3211181-3226816(Top 94%)11543(Top 94%)11543(Top 211%)
40K24.85 mi0.85 mi26546-411183-211183-226037(Top 92%)11162(Top 91%)11162(Top 204%)
25.2M25.20 mi0.35 mi26522+2411171+1211171+1224288(Top 86%)10316(Top 84%)10316(Top 189%)
Finish26.22 mi1.02 mi26497+2511161+1011161+1025583(Top 90%)10949(Top 90%)10949(Top 200%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 94%
×21story building
+97ft-345ft

Overall

26743

Females

11224

F18-39

11224

5K→10K

3.1 - 6.2 mi

Top 96%
×5story building
+79ft-138ft

Overall

27377

Females

11591

F18-39

11591

10K→15K

6.2 - 9.3 mi

Top 94%
×3story building
+67ft-78ft

Overall

26743

Females

11224

F18-39

11224

15K→20K

9.3 - 12.4 mi

Top 92%
×5story building
+106ft-86ft

Overall

26250

Females

10942

F18-39

10942

20K→Half

12.4 - 13.1 mi

Top 93%
×2story building
+19ft-37ft

Overall

26422

Females

11077

F18-39

11077

Half→25K

13.1 - 15.5 mi

Top 90%
×4story building
+66ft-88ft

Overall

25687

Females

10685

F18-39

10685

25K→30K

15.5 - 18.6 mi

Top 92%
×9story building
+181ft-148ft

Overall

26199

Females

11059

F18-39

11059

30K→20M

18.6 - 20.0 mi

Top 91%
×5story building
+64ft-50ft

Overall

25953

Females

10995

F18-39

10995

20M→21M

20.0 - 21.0 mi

Top 90%
×8story building
+106ft-24ft

Overall

25651

Females

10882

F18-39

10882

21M→35K

21.0 - 21.8 mi

Top 90%
×7story building
+17ft-86ft

Overall

25535

Females

10869

F18-39

10869

35K→23M

21.8 - 23.0 mi

Top 91%
×5story building
+23ft-63ft

Overall

25961

Females

11079

F18-39

11079

23M→24M

23.0 - 24.0 mi

Top 94%
×6story building
+12ft-82ft

Overall

26816

Females

11543

F18-39

11543

24M→40K

24.0 - 24.9 mi

Top 92%
×1story
+6ft-20ft

Overall

26037

Females

11162

F18-39

11162

40K→25.2M

24.9 - 25.2 mi

Top 86%
×1story
+13ft-16ft

Overall

24288

Females

10316

F18-39

10316

25.2M→Finish

25.2 - 26.2 mi

Top 90%
×2story building
+22ft-21ft

Overall

25583

Females

10949

F18-39

10949

Passing Analysis

Category:
Athletes Passed
1388
Passed By
314
Net Change
+1074
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#27571
5K → 10K15663+93#27571#27478
10K → 15K26411+253#27478#27225
15K → 20K27110+261#27225#26964
20K → Half425+37#26964#26927
Half → 25K2067+199#26927#26728
25K → 30K12935+94#26728#26634
30K → 20M6626+40#26634#26594
20M → 21M5918+41#26594#26553
21M → 35K3710+27#26553#26526
35K → 23M5628+28#26526#26498
23M → 24M1761-44#26498#26542
24M → 40K2125-4#26542#26546
40K → 25.2M251+24#26546#26522
25.2M → Finish3914+25#26522#26497
TOTALS1388314+1074
📊

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