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BOSTON MARATHON 2025

Karalyn Spadaro

Bib: 17887•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
7:58/mi
24:46
↑ 97↓ 3451.5%
10K· 6.21 mi
8:21/mi
50:43
↑ 79↓ 1380.4%
15K· 9.32 mi
8:08/mi
1:16:00
↑ 67↓ 78
20K· 12.43 mi
8:15/mi
1:41:39
↑ 106↓ 860.1%
Half· 13.11 mi
8:18/mi
1:47:19
↑ 19↓ 370.5%
25K· 15.53 mi
9:06/mi
2:09:22
↑ 66↓ 880.2%
30K· 18.64 mi
9:48/mi
2:39:50
↑ 181↓ 1480.2%
20M
9:30/mi
2:52:44
↑ 64↓ 500.2%
21M
12:08/mi
3:04:52
↑ 106↓ 241.6%
35K· 21.75 mi
9:27/mi
3:11:56
↑ 17↓ 861.7%
23M
9:41/mi
3:24:04
↑ 23↓ 630.6%
24M
9:40/mi
3:33:44
↓ 821.3%
40K· 24.85 mi
10:11/mi
3:42:26
↓ 200.3%
25.2M
11:07/mi
3:46:16
↑ 13↓ 160.2%
Finish· 26.22 mi
8:56/mi
3:55:22
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:47:19
Pace8:11 /mi
2nd Half
Distance13.11 mi
Time2:08:03
Pace9:46 /mi
📊Positive Split: 19.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:15:2324:467:5824:46
7:58
-
10K
6.21 mi11:41:2050:438:1025:57
8:21
+0:23
15K
9.32 mi12:06:371:16:008:0925:17
8:08
-0:13
20K
12.43 mi12:32:161:41:398:1125:39
8:15
+0:07
Half
13.11 mi12:37:561:47:198:115:40
8:18
+0:03
25K
15.53 mi12:59:592:09:228:2022:03
9:06
+0:48
30K
18.64 mi13:30:272:39:508:3430:28
9:48
+0:42
20M
20.00 mi13:43:212:52:448:3812:54
9:30
-0:18
21M
21.00 mi13:55:293:04:528:4812:08
12:08
+2:38
35K
21.75 mi14:02:333:11:568:507:04
9:27
-2:41
23M
23.00 mi14:14:413:24:048:5212:08
9:41
+0:14
24M
24.00 mi14:24:213:33:448:549:40
9:40
-0:01
40K
24.85 mi14:33:033:42:268:578:42
10:11
+0:31
25.2M
25.20 mi14:36:533:46:168:593:50
11:07
+0:56
Finish
26.22 mi14:45:593:55:228:599:06
8:56
-2:11

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

7:58 /mi

Average Pace

8:59 /mi

Slowest Pace

12:08 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:47:19

46% of race

Time at Steady Pace

1:43:23

44% of race

Time at Slower Pace

24:40

10% of race

Average Pace: 8:59 /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 mi11:15:2324:467:5824:46
7:58
#16381
10K
6.21 mi11:41:2050:438:1025:57
8:21
#17712
15K
9.32 mi12:06:371:16:008:0925:17
8:08
#17451
20K
12.43 mi12:32:161:41:398:1125:39
8:15
#17211
Half
13.11 mi12:37:561:47:198:115:40
8:18
#17242
25K
15.53 mi12:59:592:09:228:2022:03
9:06
#17770
30K
18.64 mi13:30:272:39:508:3430:28
9:48
#18603
20M
20.00 mi13:43:212:52:448:3812:54
9:30
#18648
21M
21.00 mi13:55:293:04:528:4812:08
12:08
#19201
35K
21.75 mi14:02:333:11:568:507:04
9:27
#19252
23M
23.00 mi14:14:413:24:048:5212:08
9:41
#19276
24M
24.00 mi14:24:213:33:448:549:40
9:40
#19325
40K
24.85 mi14:33:033:42:268:578:42
10:11
#19419
25.2M
25.20 mi14:36:533:46:168:593:50
11:07
#19446
Finish
26.22 mi14:45:593:55:228:599:06
8:56
#19419
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi163815383538317016(Top 60%)5745(Top 47%)5745(Top 105%)
10K6.21 mi3.10 mi17712-13316152-7696152-76918905(Top 67%)6830(Top 56%)6830(Top 125%)
15K9.32 mi3.11 mi17451+2615979+1735979+17317016(Top 60%)5745(Top 47%)5745(Top 105%)
20K12.43 mi3.11 mi17211+2405868+1115868+11116682(Top 59%)5597(Top 46%)5597(Top 102%)
Half13.11 mi0.68 mi17242-315891-235891-2318030(Top 63%)6347(Top 52%)6347(Top 116%)
25K15.53 mi2.42 mi17770-5286218-3276218-32720344(Top 72%)7723(Top 63%)7723(Top 141%)
30K18.64 mi3.11 mi18603-8336720-5026720-50221020(Top 74%)8238(Top 67%)8238(Top 151%)
20M20.00 mi1.36 mi18648-456773-536773-5319156(Top 67%)7346(Top 60%)7346(Top 134%)
21M21.00 mi1.00 mi19201-5537114-3417114-34123824(Top 84%)9933(Top 81%)9933(Top 182%)
35K21.75 mi0.75 mi19252-517161-477161-4720155(Top 71%)8058(Top 66%)8058(Top 147%)
23M23.00 mi1.25 mi19276-247203-427203-4219417(Top 68%)7738(Top 63%)7738(Top 141%)
24M24.00 mi1.00 mi19325-497262-597262-5920280(Top 71%)8227(Top 67%)8227(Top 150%)
40K24.85 mi0.85 mi19419-947333-717333-7121011(Top 74%)8669(Top 71%)8669(Top 159%)
25.2M25.20 mi0.35 mi19446-277356-237356-2321011(Top 74%)8655(Top 71%)8655(Top 158%)
Finish26.22 mi1.02 mi19419+277361-57361-518694(Top 66%)7429(Top 61%)7429(Top 136%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 60%
×21story building
+97ft-345ft

Overall

17016

Females

5745

F18-39

5745

5K→10K

3.1 - 6.2 mi

Top 67%
×5story building
+79ft-138ft

Overall

18905

Females

6830

F18-39

6830

10K→15K

6.2 - 9.3 mi

Top 60%
×3story building
+67ft-78ft

Overall

17016

Females

5745

F18-39

5745

15K→20K

9.3 - 12.4 mi

Top 59%
×5story building
+106ft-86ft

Overall

16682

Females

5597

F18-39

5597

20K→Half

12.4 - 13.1 mi

Top 63%
×2story building
+19ft-37ft

Overall

18030

Females

6347

F18-39

6347

Half→25K

13.1 - 15.5 mi

Top 72%
×4story building
+66ft-88ft

Overall

20344

Females

7723

F18-39

7723

25K→30K

15.5 - 18.6 mi

Top 74%
×9story building
+181ft-148ft

Overall

21020

Females

8238

F18-39

8238

30K→20M

18.6 - 20.0 mi

Top 67%
×5story building
+64ft-50ft

Overall

19156

Females

7346

F18-39

7346

20M→21M

20.0 - 21.0 mi

Top 84%
×8story building
+106ft-24ft

Overall

23824

Females

9933

F18-39

9933

21M→35K

21.0 - 21.8 mi

Top 71%
×7story building
+17ft-86ft

Overall

20155

Females

8058

F18-39

8058

35K→23M

21.8 - 23.0 mi

Top 68%
×5story building
+23ft-63ft

Overall

19417

Females

7738

F18-39

7738

23M→24M

23.0 - 24.0 mi

Top 71%
×6story building
+12ft-82ft

Overall

20280

Females

8227

F18-39

8227

24M→40K

24.0 - 24.9 mi

Top 74%
×1story
+6ft-20ft

Overall

21011

Females

8669

F18-39

8669

40K→25.2M

24.9 - 25.2 mi

Top 74%
×1story
+13ft-16ft

Overall

21011

Females

8655

F18-39

8655

25.2M→Finish

25.2 - 26.2 mi

Top 66%
×2story building
+22ft-21ft

Overall

18694

Females

7429

F18-39

7429

Passing Analysis

Category:
Athletes Passed
1257
Passed By
4295
Net Change
-3038
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#16381
5K → 10K331364-1331#16381#17712
10K → 15K34786+261#17712#17451
15K → 20K30363+240#17451#17211
20K → Half2253-31#17211#17242
Half → 25K66594-528#17242#17770
25K → 30K69902-833#17770#18603
30K → 20M93138-45#18603#18648
20M → 21M14567-553#18648#19201
21M → 35K4192-51#19201#19252
35K → 23M84108-24#19252#19276
23M → 24M55104-49#19276#19325
24M → 40K40134-94#19325#19419
40K → 25.2M1946-27#19419#19446
25.2M → Finish7144+27#19446#19419
TOTALS12574295-3038
📊

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