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BOSTON MARATHON 2025

Jillian Parrelli

Bib: 28374•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

Start
0:00:00
Race begins
5K· 3.11 mi
27:33
Rank: #21844
Start → 5K
27:33 | 8:52/mi
10K· 6.21 mi
53:33
Rank: #20493 (+1351)
5K → 10K
26:00 | 8:22/mi
15K· 9.32 mi
1:19:30
Rank: #19862 (+631)
10K → 15K
25:57 | 8:21/mi
20K· 12.43 mi
1:48:09
Rank: #20443 (-581)
15K → 20K
28:39 | 9:13/mi
Half· 13.11 mi
1:54:01
Rank: #20394 (+49)
20K → Half
5:52 | 8:36/mi
25K· 15.53 mi
2:16:31
Rank: #20566 (-172)
Half → 25K
22:30 | 9:17/mi
30K· 18.64 mi
2:46:29
Rank: #20530 (+36)
25K → 30K
29:58 | 9:39/mi
20M
2:59:33
Rank: #20452 (+78)
30K → 20M
13:04 | 9:37/mi
21M
3:10:29
Rank: #20521 (-69)
20M → 21M
10:56 | 10:56/mi
35K· 21.75 mi
3:16:58
Rank: #20380 (+141)
21M → 35K
6:29 | 8:40/mi
23M
3:29:29
Rank: #20416 (-36)
35K → 23M
12:31 | 10:00/mi
24M
3:39:01
Rank: #20410 (+6)
23M → 24M
9:32 | 9:32/mi
40K· 24.85 mi
3:47:04
Rank: #20342 (+68)
24M → 40K
8:03 | 9:25/mi
25.2M
3:50:44
Rank: #20346 (-4)
40K → 25.2M
3:40 | 10:38/mi
Finish· 26.22 mi
3:59:36
Rank: #20283 (+63)
25.2M → Finish
8:52 | 8:42/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:54:01
Pace8:42 /mi
2nd Half
Distance13.11 mi
Time2:05:35
Pace9:35 /mi
📊Positive Split: 10.1% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:44:5627:338:5227:33
8:52
-
10K
6.21 mi12:10:5653:338:3726:00
8:22
-0:30
15K
9.32 mi12:36:531:19:308:3225:57
8:21
-0:01
20K
12.43 mi13:05:321:48:098:4228:39
9:13
+0:52
Half
13.11 mi13:11:241:54:018:425:52
8:36
-0:37
25K
15.53 mi13:33:542:16:318:4722:30
9:17
+0:41
30K
18.64 mi14:03:522:46:298:5629:58
9:39
+0:22
20M
20.00 mi14:16:562:59:338:5913:04
9:37
-0:02
21M
21.00 mi14:27:523:10:299:0410:56
10:56
+1:19
35K
21.75 mi14:34:213:16:589:036:29
8:40
-2:16
23M
23.00 mi14:46:523:29:299:0612:31
10:00
+1:20
24M
24.00 mi14:56:243:39:019:089:32
9:32
-0:28
40K
24.85 mi15:04:273:47:049:088:03
9:25
-0:07
25.2M
25.20 mi15:08:073:50:449:093:40
10:38
+1:13
Finish
26.22 mi15:16:593:59:369:098:52
8:42
-1:56

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

8:21 /mi

Average Pace

9:09 /mi

Slowest Pace

10:56 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:40:43

42% of race

Time at Steady Pace

1:51:46

47% of race

Time at Slower Pace

27:07

11% of race

Average Pace: 9:08 /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 mi11:44:5627:338:5227:33
8:52
#21844
10K
6.21 mi12:10:5653:338:3726:00
8:22
#20493
15K
9.32 mi12:36:531:19:308:3225:57
8:21
#19862
20K
12.43 mi13:05:321:48:098:4228:39
9:13
#20443
Half
13.11 mi13:11:241:54:018:425:52
8:36
#20394
25K
15.53 mi13:33:542:16:318:4722:30
9:17
#20566
30K
18.64 mi14:03:522:46:298:5629:58
9:39
#20530
20M
20.00 mi14:16:562:59:338:5913:04
9:37
#20452
21M
21.00 mi14:27:523:10:299:0410:56
10:56
#20521
35K
21.75 mi14:34:213:16:589:036:29
8:40
#20380
23M
23.00 mi14:46:523:29:299:0612:31
10:00
#20416
24M
24.00 mi14:56:243:39:019:089:32
9:32
#20410
40K
24.85 mi15:04:273:47:049:088:03
9:25
#20342
25.2M
25.20 mi15:08:073:50:449:093:40
10:38
#20346
Finish
26.22 mi15:16:593:59:369:098:52
8:42
#20283
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi218448538853818411(Top 65%)6565(Top 54%)6565(Top 120%)
10K6.21 mi3.10 mi20493+13517769+7697769+76919011(Top 67%)6892(Top 56%)6892(Top 126%)
15K9.32 mi3.11 mi19862+6317388+3817388+38118411(Top 65%)6565(Top 54%)6565(Top 120%)
20K12.43 mi3.11 mi20443-5817728-3407728-34021971(Top 77%)8564(Top 70%)8564(Top 157%)
Half13.11 mi0.68 mi20394+497703+257703+2519864(Top 70%)7402(Top 61%)7402(Top 135%)
25K15.53 mi2.42 mi20566-1727808-1057808-10521102(Top 74%)8151(Top 67%)8151(Top 149%)
30K18.64 mi3.11 mi20530+367827-197827-1920532(Top 72%)7951(Top 65%)7951(Top 145%)
20M20.00 mi1.36 mi20452+787809+187809+1819684(Top 69%)7622(Top 62%)7622(Top 139%)
21M21.00 mi1.00 mi20521-697866-577866-5721213(Top 75%)8562(Top 70%)8562(Top 157%)
35K21.75 mi0.75 mi20380+1417802+647802+6416548(Top 58%)6107(Top 50%)6107(Top 112%)
23M23.00 mi1.25 mi20416-367842-407842-4020489(Top 72%)8289(Top 68%)8289(Top 152%)
24M24.00 mi1.00 mi20410+67855-137855-1319754(Top 70%)7961(Top 65%)7961(Top 146%)
40K24.85 mi0.85 mi20342+687844+117844+1118382(Top 65%)7331(Top 60%)7331(Top 134%)
25.2M25.20 mi0.35 mi20346-47847-37847-319532(Top 69%)7919(Top 65%)7919(Top 145%)
Finish26.22 mi1.02 mi20283+637828+197828+1917511(Top 62%)6833(Top 56%)6833(Top 125%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 65%
×21stories
+97ft-345ft

Overall

18411

Females

6565

F18-39

6565

5K→10K

3.1 - 6.2 mi

Top 67%
×5stories
+79ft-138ft

Overall

19011

Females

6892

F18-39

6892

10K→15K

6.2 - 9.3 mi

Top 65%
×3stories
+67ft-78ft

Overall

18411

Females

6565

F18-39

6565

15K→20K

9.3 - 12.4 mi

Top 77%
×5stories
+106ft-86ft

Overall

21971

Females

8564

F18-39

8564

20K→Half

12.4 - 13.1 mi

Top 70%
×2stories
+19ft-37ft

Overall

19864

Females

7402

F18-39

7402

Half→25K

13.1 - 15.5 mi

Top 74%
×4stories
+66ft-88ft

Overall

21102

Females

8151

F18-39

8151

25K→30K

15.5 - 18.6 mi

Top 72%
×9stories
+181ft-148ft

Overall

20532

Females

7951

F18-39

7951

30K→20M

18.6 - 20.0 mi

Top 69%
×5stories
+64ft-50ft

Overall

19684

Females

7622

F18-39

7622

20M→21M

20.0 - 21.0 mi

Top 75%
×8stories
+106ft-24ft

Overall

21213

Females

8562

F18-39

8562

21M→35K

21.0 - 21.8 mi

Top 58%
×7stories
+17ft-86ft

Overall

16548

Females

6107

F18-39

6107

35K→23M

21.8 - 23.0 mi

Top 72%
×5stories
+23ft-63ft

Overall

20489

Females

8289

F18-39

8289

23M→24M

23.0 - 24.0 mi

Top 70%
×6stories
+12ft-82ft

Overall

19754

Females

7961

F18-39

7961

24M→40K

24.0 - 24.9 mi

Top 65%
×1story
+6ft-20ft

Overall

18382

Females

7331

F18-39

7331

40K→25.2M

24.9 - 25.2 mi

Top 69%
×1story
+13ft-16ft

Overall

19532

Females

7919

F18-39

7919

25.2M→Finish

25.2 - 26.2 mi

Top 62%
×2stories
+22ft-21ft

Overall

17511

Females

6833

F18-39

6833

Passing Analysis

Category:
Athletes Passed
3171
Passed By
1610
Net Change
+1561
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#21844
5K → 10K136615+1351#21844#20493
10K → 15K64615+631#20493#19862
15K → 20K59640-581#19862#20443
20K → Half6213+49#20443#20394
Half → 25K107279-172#20394#20566
25K → 30K243207+36#20566#20530
30K → 20M13759+78#20530#20452
20M → 21M62131-69#20452#20521
21M → 35K1443+141#20521#20380
35K → 23M79115-36#20380#20416
23M → 24M5751+6#20416#20410
24M → 40K9931+68#20410#20342
40K → 25.2M1620-4#20342#20346
25.2M → Finish9431+63#20346#20283
TOTALS31711610+1561
📊

Passing Visuals

Category:
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🔥Passing Intensity

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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