All Results|Race Analytics|Course|Contact
BOSTON MARATHON 2026

Julia Serazio

Bib: 21861•F

MA

Boston Marathon logo
0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 29021
Gender (Female)
#0 / 12578
Top 40%
Masters (Masters Women)
#0 / 6862
Top 25%
Age Group (F45-49)
#0 / 1786
Top 29%
Race Day Weather
51°/41°F
overcast clouds

Race Timeline and Course Information

Your journey through the course with elevation, pacing, and checkpoint details

⏱️ Race Timeline

Watch your race unfold from start to finish

Start
0:00:00
Race begins
5K
24:20
3.11 mi
Rank: #15690
Start → 5K
24:20 | 7:50/mi
10K
48:24
6.21 mi
Rank: #15400 (+290)
5K → 10K
24:04 | 7:45/mi
15K
1:12:52
9.32 mi
Rank: #15569 (-169)
10K → 15K
24:28 | 7:53/mi
20K
1:37:35
12.43 mi
Rank: #15580 (-11)
15K → 20K
24:43 | 7:58/mi
HALF
1:42:56
13.11 mi
Rank: #15584 (-4)
20K → HALF
5:21 | 7:51/mi
25K
2:02:17
15.53 mi
Rank: #15528 (+56)
HALF → 25K
19:21 | 7:59/mi
30K
2:27:38
18.64 mi
Rank: #15363 (+165)
25K → 30K
25:21 | 8:10/mi
20M
2:38:48
20.00 mi
Rank: #15255 (+108)
30K → 20M
11:10 | 8:14/mi
21M
2:47:26
21.00 mi
Rank: #15142 (+113)
20M → 21M
8:38 | 8:38/mi
35K
2:53:41
21.75 mi
Rank: #15209 (-67)
21M → 35K
6:15 | 8:22/mi
23M
3:04:20
23.00 mi
Rank: #15246 (-37)
35K → 23M
10:39 | 8:31/mi
24M
3:12:36
24.00 mi
Rank: #15252 (-6)
23M → 24M
8:16 | 8:16/mi
40K
3:19:42
24.85 mi
Rank: #15208 (+44)
24M → 40K
7:06 | 8:19/mi
25.2M
3:22:49
25.20 mi
Rank: #15207 (+1)
40K → 25.2M
3:07 | 9:03/mi
FINISH
3:31:02
26.22 mi
Rank: #15231 (-24)
25.2M → FINISH
8:13 | 8:04/mi

Splits & Pacing

Detailed breakdown of your race performance at each timing point

Half Splits

1st HalfFaster
via HALF
Distance13.11 mi
Time1:42:56
Pace7:52 /mi
2nd Half
Distance13.11 mi
Time1:48:06
Pace8:15 /mi
📊Positive Split: 5.0% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:25:3124:207:5024:20
7:50
-
10K
6.21 mi11:49:3548:247:4824:04
7:45
-0:05
15K
9.32 mi12:14:031:12:527:5024:28
7:53
+0:08
20K
12.43 mi12:38:461:37:357:5224:43
7:58
+0:05
HALF
13.11 mi12:44:071:42:567:525:21
7:51
-0:07
25K
15.53 mi13:03:282:02:177:5319:21
7:59
+0:08
30K
18.64 mi13:28:492:27:387:5625:21
8:10
+0:11
20M
20.00 mi13:39:592:38:487:5711:10
8:14
+0:04
21M
21.00 mi13:48:372:47:267:598:38
8:38
+0:24
35K
21.75 mi13:54:522:53:418:006:15
8:22
-0:16
23M
23.00 mi14:05:313:04:208:0110:39
8:31
+0:09
24M
24.00 mi14:13:473:12:368:028:16
8:16
-0:15
40K
24.85 mi14:20:533:19:428:037:06
8:19
+0:03
25.2M
25.20 mi14:24:003:22:498:033:07
9:03
+0:44
FINISH
26.22 mi14:32:133:31:028:048:13
8:04
-0:59

Checkpoint Splits Visualizations

Explore your race data through different visual perspectives. Scroll to discover each visualization.

📈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

7:45 /mi

Average Pace

8:03 /mi

Slowest Pace

9:03 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Bar length shows time spent in each segment. Colors mark your faster to slower segments, relative to your own pace.

Time at Faster Pace

3:19:17

94% of race

Time at Steady Pace

11:45

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:03 /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

Enhanced split table showing pace trends through mini sparkline visualizations.

Overall Pace Trend

CheckpointDistanceTime of DayTimeAvg PaceSegmentPaceTrendRank
5K
3.11 mi11:25:3124:207:5024:20
7:50
#15690
10K
6.21 mi11:49:3548:247:4824:04
7:45
#15400
15K
9.32 mi12:14:031:12:527:5024:28
7:53
#15569
20K
12.43 mi12:38:461:37:357:5224:43
7:58
#15580
HALF
13.11 mi12:44:071:42:567:525:21
7:51
#15584
25K
15.53 mi13:03:282:02:177:5319:21
7:59
#15528
30K
18.64 mi13:28:492:27:387:5625:21
8:10
#15363
20M
20.00 mi13:39:592:38:487:5711:10
8:14
#15255
21M
21.00 mi13:48:372:47:267:598:38
8:38
#15142
35K
21.75 mi13:54:522:53:418:006:15
8:22
#15209
23M
23.00 mi14:05:313:04:208:0110:39
8:31
#15246
24M
24.00 mi14:13:473:12:368:028:16
8:16
#15252
40K
24.85 mi14:20:533:19:428:037:06
8:19
#15208
25.2M
25.20 mi14:24:003:22:498:033:07
9:03
#15207
FINISH
26.22 mi14:32:133:31:028:048:13
8:04
#15231
Faster pace
Steady pace
Slower pace

Rankings

Your position at each checkpoint and how you ranked in each segment

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF45-49Seg. OverallSeg. FemalesSeg. F45-49
5K3.11 mi3.11 mi156905114511415986(Top 55%)5330(Top 42%)5330(Top 298%)
10K6.21 mi3.10 mi15400+2904960+1544960+15415153(Top 52%)4804(Top 38%)4804(Top 269%)
15K9.32 mi3.11 mi15569-1695081-1215081-12115986(Top 55%)5330(Top 42%)5330(Top 298%)
20K12.43 mi3.11 mi15580-115108-275108-2715800(Top 54%)5267(Top 42%)5267(Top 295%)
HALF13.11 mi0.68 mi15584-45110-25110-216000(Top 55%)5335(Top 42%)5335(Top 299%)
25K15.53 mi2.42 mi15528+565091+195091+1915255(Top 53%)5004(Top 40%)5004(Top 280%)
30K18.64 mi3.11 mi15363+1655025+665025+6614678(Top 51%)4790(Top 38%)4790(Top 268%)
20M20.00 mi1.36 mi15255+1084976+494976+4914421(Top 50%)4722(Top 38%)4722(Top 264%)
21M21.00 mi1.00 mi15142+1134941+354941+3514004(Top 48%)4590(Top 36%)4590(Top 257%)
35K21.75 mi0.75 mi15209-674990-494990-4916774(Top 58%)6185(Top 49%)6185(Top 346%)
23M23.00 mi1.25 mi15246-375039-495039-4915784(Top 54%)5715(Top 45%)5715(Top 320%)
24M24.00 mi1.00 mi15252-65062-235062-2315495(Top 53%)5603(Top 45%)5603(Top 314%)
40K24.85 mi0.85 mi15208+445052+105052+1014509(Top 50%)5165(Top 41%)5165(Top 289%)
25.2M25.20 mi0.35 mi15207+15057-55057-514998(Top 52%)5448(Top 43%)5448(Top 305%)
FINISH26.22 mi1.02 mi15231-245086-295086-2915586(Top 54%)5721(Top 45%)5721(Top 320%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 55%
×21
+97ft-345ft

Overall

15986

Females

5330

F45-49

5330

5K→10K

3.1 - 6.2 mi

Top 52%
×5
+79ft-138ft

Overall

15153

Females

4804

F45-49

4804

10K→15K

6.2 - 9.3 mi

Top 55%
×3
+67ft-78ft

Overall

15986

Females

5330

F45-49

5330

15K→20K

9.3 - 12.4 mi

Top 54%
×5
+106ft-86ft

Overall

15800

Females

5267

F45-49

5267

20K→HALF

12.4 - 13.1 mi

Top 55%
×2
+19ft-37ft

Overall

16000

Females

5335

F45-49

5335

HALF→25K

13.1 - 15.5 mi

Top 53%
×4
+66ft-88ft

Overall

15255

Females

5004

F45-49

5004

25K→30K

15.5 - 18.6 mi

Top 51%
×9
+181ft-148ft

Overall

14678

Females

4790

F45-49

4790

30K→20M

18.6 - 20.0 mi

Top 50%
×5
+64ft-50ft

Overall

14421

Females

4722

F45-49

4722

20M→21M

20.0 - 21.0 mi

Top 48%
×8
+106ft-24ft

Overall

14004

Females

4590

F45-49

4590

21M→35K

21.0 - 21.8 mi

Top 58%
×7
+17ft-86ft

Overall

16774

Females

6185

F45-49

6185

35K→23M

21.8 - 23.0 mi

Top 54%
×5
+23ft-63ft

Overall

15784

Females

5715

F45-49

5715

23M→24M

23.0 - 24.0 mi

Top 53%
×6
+12ft-82ft

Overall

15495

Females

5603

F45-49

5603

24M→40K

24.0 - 24.9 mi

Top 50%
×1
+6ft-20ft

Overall

14509

Females

5165

F45-49

5165

40K→25.2M

24.9 - 25.2 mi

Top 52%
×1
+13ft-16ft

Overall

14998

Females

5448

F45-49

5448

25.2M→FINISH

25.2 - 26.2 mi

Top 54%
×2
+22ft-21ft

Overall

15586

Females

5721

F45-49

5721

Passing

Athletes you passed and who passed you throughout the race

Passing Analysis

Category:
Athletes Passed
1932
Passed By
1473
Net Change
+459
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#15690
5K → 10K445155+290#15690#15400
10K → 15K150319-169#15400#15569
15K → 20K166177-11#15569#15580
20K → HALF4246-4#15580#15584
HALF → 25K162106+56#15584#15528
25K → 30K270105+165#15528#15363
30K → 20M15042+108#15363#15255
20M → 21M16249+113#15255#15142
21M → 35K42109-67#15142#15209
35K → 23M76113-37#15209#15246
23M → 24M7379-6#15246#15252
24M → 40K9551+44#15252#15208
40K → 25.2M3231+1#15208#15207
25.2M → FINISH6791-24#15207#15231
TOTALS19321473+459
📊

Passing Analysis Visualizations

Explore your passing analysis through 5 different visualizations. Scroll to discover each one.

Time:
Category:

📈Position Graph

Loading...

🎨Heatmap Timeline

Loading...

🔄Passing Circle

Loading...

🌊Position Flow

Loading...

🏃Race Lanes

Loading...

Qualifying & Age Grade

See how your performance stacks up against qualifying standards

OTQ

Olympic Trials Qualifying analysis available

Activity Data

Upload your GPX file to see detailed activity metrics

Upload your GPX file

Supports Garmin, Apple Watch, Polar, Suunto, COROS, Strava, and other apps

.gpx files up to 10MB

Export & Support

Download your data, get help, and share your feedback

Export Track Data

Download your race performance as a GPX or TCX file to import into Strava, Garmin Connect, or other fitness apps.

Questions or issues regarding timing data?

If you notice any discrepancies in your timing data or have questions about your results, our support team can help.

Contact Race Support
Share Feedback

Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing