Boston Marathon logo
BOSTON MARATHON 2023

Marianna Vallazza

Bib: 27681•F

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 26622
Top 33%
Gender (Female)
#0 / 11423
Top 13%
Division (F18-39)
#0 / 4884
Top 24%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ 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
7:31/mi
23:21
↑ 97↓ 3451.5%
10K· 6.21 mi
7:20/mi
46:08
↑ 79↓ 1380.4%
15K· 9.32 mi
7:30/mi
1:09:26
↑ 67↓ 78
20K· 12.43 mi
7:32/mi
1:32:50
↑ 106↓ 860.1%
Half· 13.11 mi
7:26/mi
1:37:54
↑ 19↓ 370.5%
25K· 15.53 mi
7:34/mi
1:56:15
↑ 66↓ 880.2%
30K· 18.64 mi
7:43/mi
2:20:15
↑ 181↓ 1480.2%
20M
7:41/mi
2:30:42
↑ 64↓ 500.2%
21M
8:08/mi
2:38:50
↑ 106↓ 241.6%
35K· 21.75 mi
7:10/mi
2:44:12
↑ 17↓ 861.7%
23M
7:45/mi
2:53:54
↑ 23↓ 630.6%
24M
7:22/mi
3:01:16
↓ 821.3%
40K· 24.85 mi
7:34/mi
3:07:44
↓ 200.3%
25.2M
8:16/mi
3:10:35
↑ 13↓ 160.2%
Finish· 26.22 mi
7:32/mi
3:18:16
↑ 22↓ 21

The Course

Is this your race?

Claim it — unlock a deeper AI report on this race, free

A personalized Race Performance Report that goes beyond this page — emailed to you, built from your real splits.

Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:37:54
Pace7:28 /mi
2nd Half
Distance13.11 mi
Time1:40:22
Pace7:39 /mi
📊Positive Split: 2.5% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:40:0723:217:3123:21
7:31
-
10K
6.21 mi12:02:5446:087:2522:47
7:20
-0:11
15K
9.32 mi12:26:121:09:267:2723:18
7:30
+0:10
20K
12.43 mi12:49:361:32:507:2823:24
7:32
+0:02
Half
13.11 mi12:54:401:37:547:285:04
7:26
-0:06
25K
15.53 mi13:13:011:56:157:2918:21
7:34
+0:08
30K
18.64 mi13:37:012:20:157:3124:00
7:43
+0:09
20M
20.00 mi13:47:282:30:427:3210:27
7:41
-0:02
21M
21.00 mi13:55:362:38:507:348:08
8:08
+0:27
35K
21.75 mi14:00:582:44:127:335:22
7:10
-0:58
23M
23.00 mi14:10:402:53:547:349:42
7:45
+0:35
24M
24.00 mi14:18:023:01:167:337:22
7:22
-0:23
40K
24.85 mi14:24:303:07:447:336:28
7:34
+0:12
25.2M
25.20 mi14:27:213:10:357:342:51
8:16
+0:42
Finish
26.22 mi14:35:023:18:167:347:41
7:32
-0:44

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

7:10 /mi

Average Pace

7:34 /mi

Slowest Pace

8:16 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:07:17

94% of race

Time at Steady Pace

10:59

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:34 /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 mi11:40:0723:217:3123:21
7:31
#9768
10K
6.21 mi12:02:5446:087:2522:47
7:20
#9378
15K
9.32 mi12:26:121:09:267:2723:18
7:30
#9607
20K
12.43 mi12:49:361:32:507:2823:24
7:32
#9573
Half
13.11 mi12:54:401:37:547:285:04
7:26
#9575
25K
15.53 mi13:13:011:56:157:2918:21
7:34
#9503
30K
18.64 mi13:37:012:20:157:3124:00
7:43
#9349
20M
20.00 mi13:47:282:30:427:3210:27
7:41
#9236
21M
21.00 mi13:55:362:38:507:348:08
8:08
#9129
35K
21.75 mi14:00:582:44:127:335:22
7:10
#9013
23M
23.00 mi14:10:402:53:547:349:42
7:45
#8939
24M
24.00 mi14:18:023:01:167:337:22
7:22
#8804
40K
24.85 mi14:24:303:07:447:336:28
7:34
#8725
25.2M
25.20 mi14:27:213:10:357:342:51
8:16
#8700
Finish
26.22 mi14:35:023:18:167:347:41
7:32
#8679
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi97681740174010176(Top 38%)1920(Top 17%)1920(Top 39%)
10K6.21 mi3.10 mi9378+3901561+1791561+1799120(Top 34%)1463(Top 13%)1463(Top 30%)
15K9.32 mi3.11 mi9607-2291662-1011662-10110176(Top 38%)1920(Top 17%)1920(Top 39%)
20K12.43 mi3.11 mi9573+341659+31659+39573(Top 36%)1718(Top 15%)1718(Top 35%)
Half13.11 mi0.68 mi9575-21656+31656+39661(Top 36%)1732(Top 15%)1732(Top 35%)
25K15.53 mi2.42 mi9503+721647+91647+99308(Top 35%)1680(Top 15%)1680(Top 34%)
30K18.64 mi3.11 mi9349+1541628+191628+198833(Top 33%)1644(Top 14%)1644(Top 34%)
20M20.00 mi1.36 mi9236+1131608+201608+208128(Top 31%)1449(Top 13%)1449(Top 30%)
21M21.00 mi1.00 mi9129+1071588+201588+208223(Top 31%)1619(Top 14%)1619(Top 33%)
35K21.75 mi0.75 mi9013+1161546+421546+426425(Top 24%)904(Top 8%)904(Top 19%)
23M23.00 mi1.25 mi8939+741542+41542+48067(Top 30%)1611(Top 14%)1611(Top 33%)
24M24.00 mi1.00 mi8804+1351519+231519+236867(Top 26%)1224(Top 11%)1224(Top 25%)
40K24.85 mi0.85 mi8725+791507+121507+127136(Top 27%)1423(Top 12%)1423(Top 29%)
25.2M25.20 mi0.35 mi8700+251505+21505+28145(Top 31%)1872(Top 16%)1872(Top 38%)
Finish26.22 mi1.02 mi8679+211520-151520-158865(Top 33%)2178(Top 19%)2178(Top 45%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 38%
×21story building
+97ft-345ft

Overall

10176

Females

1920

F18-39

1920

5K→10K

3.1 - 6.2 mi

Top 34%
×5story building
+79ft-138ft

Overall

9120

Females

1463

F18-39

1463

10K→15K

6.2 - 9.3 mi

Top 38%
×3story building
+67ft-78ft

Overall

10176

Females

1920

F18-39

1920

15K→20K

9.3 - 12.4 mi

Top 36%
×5story building
+106ft-86ft

Overall

9573

Females

1718

F18-39

1718

20K→Half

12.4 - 13.1 mi

Top 36%
×2story building
+19ft-37ft

Overall

9661

Females

1732

F18-39

1732

Half→25K

13.1 - 15.5 mi

Top 35%
×4story building
+66ft-88ft

Overall

9308

Females

1680

F18-39

1680

25K→30K

15.5 - 18.6 mi

Top 33%
×9story building
+181ft-148ft

Overall

8833

Females

1644

F18-39

1644

30K→20M

18.6 - 20.0 mi

Top 31%
×5story building
+64ft-50ft

Overall

8128

Females

1449

F18-39

1449

20M→21M

20.0 - 21.0 mi

Top 31%
×8story building
+106ft-24ft

Overall

8223

Females

1619

F18-39

1619

21M→35K

21.0 - 21.8 mi

Top 24%
×7story building
+17ft-86ft

Overall

6425

Females

904

F18-39

904

35K→23M

21.8 - 23.0 mi

Top 30%
×5story building
+23ft-63ft

Overall

8067

Females

1611

F18-39

1611

23M→24M

23.0 - 24.0 mi

Top 26%
×6story building
+12ft-82ft

Overall

6867

Females

1224

F18-39

1224

24M→40K

24.0 - 24.9 mi

Top 27%
×1story
+6ft-20ft

Overall

7136

Females

1423

F18-39

1423

40K→25.2M

24.9 - 25.2 mi

Top 31%
×1story
+13ft-16ft

Overall

8145

Females

1872

F18-39

1872

25.2M→Finish

25.2 - 26.2 mi

Top 33%
×2story building
+22ft-21ft

Overall

8865

Females

2178

F18-39

2178

Passing Analysis

Category:
Athletes Passed
2044*
Passed By
955
Net Change
+1089
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#9768
5K → 10K521131+390#9768#9378
10K → 15K86315-229#9378#9607
15K → 20K157123+34#9607#9573
20K → Half2830-2#9573#9575
Half → 25K15280+72#9575#9503
25K → 30K249*95+154#9503#9349
30K → 20M13724+113#9349#9236
20M → 21M13326+107#9236#9129
21M → 35K1182+116#9129#9013
35K → 23M11440+74#9013#8939
23M → 24M1416+135#8939#8804
24M → 40K9920+79#8804#8725
40K → 25.2M3712+25#8725#8700
25.2M → Finish7251+21#8700#8679
TOTALS2044*955+1089

* Includes athletes who did not complete a segment (DNF/DNQ).

📊

Passing Visuals

Category:
Loading...

🔄Passing Circle

Loading...

🌊Position Flow

Loading...

🏃Race Lanes

Loading...

Upload your GPX file

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

.gpx files up to 10MB

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

Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing