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BOSTON MARATHON 2025

Natalie Ucci

Bib: 19045•F

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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
25:21
Rank: #17840
Start → 5K
25:21 | 8:10/mi
10K· 6.21 mi
50:52
Rank: #17891 (-51)
5K → 10K
25:31 | 8:13/mi
15K· 9.32 mi
1:16:51
Rank: #18070 (-179)
10K → 15K
25:59 | 8:22/mi
20K· 12.43 mi
1:43:51
Rank: #18365 (-295)
15K → 20K
27:00 | 8:41/mi
Half· 13.11 mi
1:49:45
Rank: #18459 (-94)
20K → Half
5:54 | 8:39/mi
25K· 15.53 mi
2:11:43
Rank: #18790 (-331)
Half → 25K
21:58 | 9:04/mi
30K· 18.64 mi
2:41:36
Rank: #19167 (-377)
25K → 30K
29:53 | 9:37/mi
20M
2:55:45
Rank: #19501 (-334)
30K → 20M
14:09 | 10:25/mi
21M
3:07:10
Rank: #19763 (-262)
20M → 21M
11:25 | 11:25/mi
35K· 21.75 mi
3:15:08
Rank: #19979 (-216)
21M → 35K
7:58 | 10:39/mi
23M
3:27:36
Rank: #20040 (-61)
35K → 23M
12:28 | 9:57/mi
24M
3:36:37
Rank: #19931 (+109)
23M → 24M
9:01 | 9:01/mi
40K· 24.85 mi
3:44:13
Rank: #19781 (+150)
24M → 40K
7:36 | 8:53/mi
25.2M
3:47:27
Rank: #19697 (+84)
40K → 25.2M
3:14 | 9:23/mi
Finish· 26.22 mi
3:56:21
Rank: #19627 (+70)
25.2M → Finish
8:54 | 8:44/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:49:45
Pace8:22 /mi
2nd Half
Distance13.11 mi
Time2:06:36
Pace9:39 /mi
📊Positive Split: 15.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:17:2525:218:1025:21
8:10
-
10K
6.21 mi11:42:5650:528:1125:31
8:13
+0:03
15K
9.32 mi12:08:551:16:518:1525:59
8:22
+0:09
20K
12.43 mi12:35:551:43:518:2127:00
8:41
+0:19
Half
13.11 mi12:41:491:49:458:225:54
8:39
-0:02
25K
15.53 mi13:03:472:11:438:2921:58
9:04
+0:25
30K
18.64 mi13:33:402:41:368:4029:53
9:37
+0:33
20M
20.00 mi13:47:492:55:458:4714:09
10:25
+0:48
21M
21.00 mi13:59:143:07:108:5511:25
11:25
+1:00
35K
21.75 mi14:07:123:15:088:587:58
10:39
-0:46
23M
23.00 mi14:19:403:27:369:0212:28
9:57
-0:42
24M
24.00 mi14:28:413:36:379:029:01
9:01
-0:56
40K
24.85 mi14:36:173:44:139:017:36
8:53
-0:08
25.2M
25.20 mi14:39:313:47:279:023:14
9:23
+0:30
Finish
26.22 mi14:48:253:56:219:018:54
8:44
-0:39

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

8:10 /mi

Average Pace

9:01 /mi

Slowest Pace

11:25 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:16:51

33% of race

Time at Steady Pace

1:23:37

35% of race

Time at Slower Pace

1:15:53

32% of race

Average Pace: 9:01 /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 mi11:17:2525:218:1025:21
8:10
#17840
10K
6.21 mi11:42:5650:528:1125:31
8:13
#17891
15K
9.32 mi12:08:551:16:518:1525:59
8:22
#18070
20K
12.43 mi12:35:551:43:518:2127:00
8:41
#18365
Half
13.11 mi12:41:491:49:458:225:54
8:39
#18459
25K
15.53 mi13:03:472:11:438:2921:58
9:04
#18790
30K
18.64 mi13:33:402:41:368:4029:53
9:37
#19167
20M
20.00 mi13:47:492:55:458:4714:09
10:25
#19501
21M
21.00 mi13:59:143:07:108:5511:25
11:25
#19763
35K
21.75 mi14:07:123:15:088:587:58
10:39
#19979
23M
23.00 mi14:19:403:27:369:0212:28
9:57
#20040
24M
24.00 mi14:28:413:36:379:029:01
9:01
#19931
40K
24.85 mi14:36:173:44:139:017:36
8:53
#19781
25.2M
25.20 mi14:39:313:47:279:023:14
9:23
#19697
Finish
26.22 mi14:48:253:56:219:018:54
8:44
#19627
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi178406244624418486(Top 65%)6602(Top 54%)6602(Top 121%)
10K6.21 mi3.10 mi17891-516264-206264-2017997(Top 63%)6291(Top 51%)6291(Top 115%)
15K9.32 mi3.11 mi18070-1796374-1106374-11018486(Top 65%)6602(Top 54%)6602(Top 121%)
20K12.43 mi3.11 mi18365-2956548-1746548-17419378(Top 68%)7123(Top 58%)7123(Top 130%)
Half13.11 mi0.68 mi18459-946592-446592-4420093(Top 71%)7533(Top 62%)7533(Top 138%)
25K15.53 mi2.42 mi18790-3316793-2016793-20120181(Top 71%)7635(Top 62%)7635(Top 140%)
30K18.64 mi3.11 mi19167-3777053-2607053-26020424(Top 72%)7887(Top 64%)7887(Top 144%)
20M20.00 mi1.36 mi19501-3347268-2157268-21522186(Top 78%)9001(Top 74%)9001(Top 165%)
21M21.00 mi1.00 mi19763-2627436-1687436-16822435(Top 79%)9206(Top 75%)9206(Top 168%)
35K21.75 mi0.75 mi19979-2167576-1407576-14023484(Top 83%)9793(Top 80%)9793(Top 179%)
23M23.00 mi1.25 mi20040-617639-637639-6320347(Top 72%)8218(Top 67%)8218(Top 150%)
24M24.00 mi1.00 mi19931+1097608+317608+3117489(Top 62%)6766(Top 55%)6766(Top 124%)
40K24.85 mi0.85 mi19781+1507544+647544+6415746(Top 55%)5930(Top 48%)5930(Top 108%)
25.2M25.20 mi0.35 mi19697+847504+407504+4014019(Top 49%)5062(Top 41%)5062(Top 93%)
Finish26.22 mi1.02 mi19627+707480+247480+2417705(Top 62%)6930(Top 57%)6930(Top 127%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 65%
×21stories
+97ft-345ft

Overall

18486

Females

6602

F18-39

6602

5K→10K

3.1 - 6.2 mi

Top 63%
×5stories
+79ft-138ft

Overall

17997

Females

6291

F18-39

6291

10K→15K

6.2 - 9.3 mi

Top 65%
×3stories
+67ft-78ft

Overall

18486

Females

6602

F18-39

6602

15K→20K

9.3 - 12.4 mi

Top 68%
×5stories
+106ft-86ft

Overall

19378

Females

7123

F18-39

7123

20K→Half

12.4 - 13.1 mi

Top 71%
×2stories
+19ft-37ft

Overall

20093

Females

7533

F18-39

7533

Half→25K

13.1 - 15.5 mi

Top 71%
×4stories
+66ft-88ft

Overall

20181

Females

7635

F18-39

7635

25K→30K

15.5 - 18.6 mi

Top 72%
×9stories
+181ft-148ft

Overall

20424

Females

7887

F18-39

7887

30K→20M

18.6 - 20.0 mi

Top 78%
×5stories
+64ft-50ft

Overall

22186

Females

9001

F18-39

9001

20M→21M

20.0 - 21.0 mi

Top 79%
×8stories
+106ft-24ft

Overall

22435

Females

9206

F18-39

9206

21M→35K

21.0 - 21.8 mi

Top 83%
×7stories
+17ft-86ft

Overall

23484

Females

9793

F18-39

9793

35K→23M

21.8 - 23.0 mi

Top 72%
×5stories
+23ft-63ft

Overall

20347

Females

8218

F18-39

8218

23M→24M

23.0 - 24.0 mi

Top 62%
×6stories
+12ft-82ft

Overall

17489

Females

6766

F18-39

6766

24M→40K

24.0 - 24.9 mi

Top 55%
×1story
+6ft-20ft

Overall

15746

Females

5930

F18-39

5930

40K→25.2M

24.9 - 25.2 mi

Top 49%
×1story
+13ft-16ft

Overall

14019

Females

5062

F18-39

5062

25.2M→Finish

25.2 - 26.2 mi

Top 62%
×2stories
+22ft-21ft

Overall

17705

Females

6930

F18-39

6930

Passing Analysis

Category:
Athletes Passed
1351
Passed By
3138
Net Change
-1787
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#17840
5K → 10K265316-51#17840#17891
10K → 15K128307-179#17891#18070
15K → 20K110405-295#18070#18365
20K → Half10104-94#18365#18459
Half → 25K87418-331#18459#18790
25K → 30K130507-377#18790#19167
30K → 20M38372-334#19167#19501
20M → 21M39301-262#19501#19763
21M → 35K20236-216#19763#19979
35K → 23M66127-61#19979#20040
23M → 24M12516+109#20040#19931
24M → 40K1533+150#19931#19781
40K → 25.2M840+84#19781#19697
25.2M → Finish9626+70#19697#19627
TOTALS13513138-1787
📊

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