Boston Marathon logo
BOSTON MARATHON 2023

Zeferina Terrazas Vazquez

Bib: 23057•F

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 26622
Gender (Female)
#0 / 11423
Masters (Masters Women)
#0 / 6539
Top 41%
Division (F55-59)
#0 / 815
Top 18%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
24:45
Rank: #13784
Start → 5K
7:58/mi
24:45 split
10K· 6.21 mi
48:50
Rank: #13278 (+506)
5K → 10K
7:45/mi
24:05 split
15K· 9.32 mi
1:13:50
Rank: #13753 (-475)
10K → 15K
8:03/mi
25:00 split
20K· 12.43 mi
1:40:03
Rank: #14497 (-744)
15K → 20K
8:26/mi
26:13 split
Half· 13.11 mi
1:45:37
Rank: #14565 (-68)
20K → Half
8:10/mi
5:34 split
25K· 15.53 mi
2:06:45
Rank: #15065 (-500)
Half → 25K
8:43/mi
21:08 split
30K· 18.64 mi
2:36:34
Rank: #16153 (-1088)
25K → 30K
9:36/mi
29:49 split
20M
2:49:48
Rank: #16454 (-301)
30K → 20M
9:44/mi
13:14 split
21M
2:59:32
Rank: #16486 (-32)
20M → 21M
9:44/mi
9:44 split
35K· 21.75 mi
3:05:55
Rank: #16443 (+43)
21M → 35K
8:32/mi
6:23 split
23M
3:18:03
Rank: #16644 (-201)
35K → 23M
9:41/mi
12:08 split
24M
3:26:43
Rank: #16588 (+56)
23M → 24M
8:40/mi
8:40 split
40K· 24.85 mi
3:34:26
Rank: #16568 (+20)
24M → 40K
9:02/mi
7:43 split
25.2M
3:37:49
Rank: #16561 (+7)
40K → 25.2M
9:49/mi
3:23 split
Finish· 26.22 mi
3:47:01
Rank: #16623 (-62)
25.2M → Finish
9:02/mi
9:12 split

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
Time1:45:37
Pace8:03 /mi
2nd Half
Distance13.11 mi
Time2:01:24
Pace9:16 /mi
📊Positive Split: 14.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:19:0924:457:5824:45
7:58
-
10K
6.21 mi11:43:1448:507:5224:05
7:45
-0:13
15K
9.32 mi12:08:141:13:507:5525:00
8:03
+0:18
20K
12.43 mi12:34:271:40:038:0326:13
8:26
+0:23
Half
13.11 mi12:40:011:45:378:035:34
8:10
-0:16
25K
15.53 mi13:01:092:06:458:1021:08
8:43
+0:33
30K
18.64 mi13:30:582:36:348:2429:49
9:36
+0:53
20M
20.00 mi13:44:122:49:488:2913:14
9:44
+0:08
21M
21.00 mi13:53:562:59:328:339:44
9:44
0:00
35K
21.75 mi14:00:193:05:558:336:23
8:32
-1:12
23M
23.00 mi14:12:273:18:038:3712:08
9:41
+1:09
24M
24.00 mi14:21:073:26:438:378:40
8:40
-1:01
40K
24.85 mi14:28:503:34:268:387:43
9:02
+0:22
25.2M
25.20 mi14:32:133:37:498:393:23
9:49
+0:47
Finish
26.22 mi14:41:253:47:018:409:12
9:02
-0:47

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

7:45 /mi

Average Pace

8:40 /mi

Slowest Pace

9:49 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:19:24

35% of race

Time at Steady Pace

1:19:19

35% of race

Time at Slower Pace

1:08:18

30% of race

Average Pace: 8:39 /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 mi11:19:0924:457:5824:45
7:58
#13784
10K
6.21 mi11:43:1448:507:5224:05
7:45
#13278
15K
9.32 mi12:08:141:13:507:5525:00
8:03
#13753
20K
12.43 mi12:34:271:40:038:0326:13
8:26
#14497
Half
13.11 mi12:40:011:45:378:035:34
8:10
#14565
25K
15.53 mi13:01:092:06:458:1021:08
8:43
#15065
30K
18.64 mi13:30:582:36:348:2429:49
9:36
#16153
20M
20.00 mi13:44:122:49:488:2913:14
9:44
#16454
21M
21.00 mi13:53:562:59:328:339:44
9:44
#16486
35K
21.75 mi14:00:193:05:558:336:23
8:32
#16443
23M
23.00 mi14:12:273:18:038:3712:08
9:41
#16644
24M
24.00 mi14:21:073:26:438:378:40
8:40
#16588
40K
24.85 mi14:28:503:34:268:387:43
9:02
#16568
25.2M
25.20 mi14:32:133:37:498:393:23
9:49
#16561
Finish
26.22 mi14:41:253:47:018:409:12
9:02
#16623
Faster pace
Steady pace
Slower pace
Est.Checkpoint not recorded (estimated)
~Segment time uses estimated prior

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF55-59Seg. OverallSeg. FemalesSeg. F55-59
5K3.11 mi3.11 mi137843896389614791(Top 56%)4564(Top 40%)4564(Top 560%)
10K6.21 mi3.10 mi13278+5063615+2813615+28112716(Top 48%)3269(Top 29%)3269(Top 401%)
15K9.32 mi3.11 mi13753-4753914-2993914-29914791(Top 56%)4564(Top 40%)4564(Top 560%)
20K12.43 mi3.11 mi14497-7444370-4564370-45616485(Top 62%)5640(Top 49%)5640(Top 692%)
Half13.11 mi0.68 mi14565-684406-364406-3615581(Top 59%)5053(Top 44%)5053(Top 620%)
25K15.53 mi2.42 mi15065-5004749-3434749-34317467(Top 66%)6260(Top 55%)6260(Top 768%)
30K18.64 mi3.11 mi16153-10885474-7255474-72519782(Top 74%)7639(Top 67%)7639(Top 937%)
20M20.00 mi1.36 mi16454-3015679-2055679-20519654(Top 74%)7671(Top 67%)7671(Top 941%)
21M21.00 mi1.00 mi16486-325703-245703-2417019(Top 64%)6212(Top 54%)6212(Top 762%)
35K21.75 mi0.75 mi16443+435683+205683+2015525(Top 58%)5431(Top 48%)5431(Top 666%)
23M23.00 mi1.25 mi16644-2015817-1345817-13419049(Top 72%)7432(Top 65%)7432(Top 912%)
24M24.00 mi1.00 mi16588+565798+195798+1915495(Top 58%)5535(Top 48%)5535(Top 679%)
40K24.85 mi0.85 mi16568+205807-95807-916303(Top 61%)6028(Top 53%)6028(Top 740%)
25.2M25.20 mi0.35 mi16561+75809-25809-216629(Top 62%)6218(Top 54%)6218(Top 763%)
Finish26.22 mi1.02 mi16623-625851-425851-4218121(Top 68%)6959(Top 61%)6959(Top 854%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 56%
×21story building
+97ft-345ft

Overall

14791

Females

4564

F55-59

4564

5K→10K

3.1 - 6.2 mi

Top 48%
×5story building
+79ft-138ft

Overall

12716

Females

3269

F55-59

3269

10K→15K

6.2 - 9.3 mi

Top 56%
×3story building
+67ft-78ft

Overall

14791

Females

4564

F55-59

4564

15K→20K

9.3 - 12.4 mi

Top 62%
×5story building
+106ft-86ft

Overall

16485

Females

5640

F55-59

5640

20K→Half

12.4 - 13.1 mi

Top 59%
×2story building
+19ft-37ft

Overall

15581

Females

5053

F55-59

5053

Half→25K

13.1 - 15.5 mi

Top 66%
×4story building
+66ft-88ft

Overall

17467

Females

6260

F55-59

6260

25K→30K

15.5 - 18.6 mi

Top 74%
×9story building
+181ft-148ft

Overall

19782

Females

7639

F55-59

7639

30K→20M

18.6 - 20.0 mi

Top 74%
×5story building
+64ft-50ft

Overall

19654

Females

7671

F55-59

7671

20M→21M

20.0 - 21.0 mi

Top 64%
×8story building
+106ft-24ft

Overall

17019

Females

6212

F55-59

6212

21M→35K

21.0 - 21.8 mi

Top 58%
×7story building
+17ft-86ft

Overall

15525

Females

5431

F55-59

5431

35K→23M

21.8 - 23.0 mi

Top 72%
×5story building
+23ft-63ft

Overall

19049

Females

7432

F55-59

7432

23M→24M

23.0 - 24.0 mi

Top 58%
×6story building
+12ft-82ft

Overall

15495

Females

5535

F55-59

5535

24M→40K

24.0 - 24.9 mi

Top 61%
×1story
+6ft-20ft

Overall

16303

Females

6028

F55-59

6028

40K→25.2M

24.9 - 25.2 mi

Top 62%
×1story
+13ft-16ft

Overall

16629

Females

6218

F55-59

6218

25.2M→Finish

25.2 - 26.2 mi

Top 68%
×2story building
+22ft-21ft

Overall

18121

Females

6959

F55-59

6959

Passing Analysis

Category:
Athletes Passed
1248
Passed By
4087
Net Change
-2839
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#13784
5K → 10K630124+506#13784#13278
10K → 15K65540-475#13278#13753
15K → 20K50794-744#13753#14497
20K → Half1280-68#14497#14565
Half → 25K48548-500#14565#15065
25K → 30K181106-1088#15065#16153
30K → 20M28329-301#16153#16454
20M → 21M73105-32#16454#16486
21M → 35K6926+43#16486#16443
35K → 23M35236-201#16443#16644
23M → 24M8731+56#16644#16588
24M → 40K6444+20#16588#16568
40K → 25.2M3629+7#16568#16561
25.2M → Finish3395-62#16561#16623
TOTALS12484087-2839
📊

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
Share Feedback

Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing