Boston Marathon logo
BOSTON MARATHON 2023

Holly Loscavio

Bib: 21128•F

GA

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 26622
Gender (Female)
#0 / 11423
Masters (Masters Women)
#0 / 6539
Division (F50-54)
#0 / 1207
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
8:42/mi
27:02
↑ 97↓ 3451.5%
10K· 6.21 mi
8:38/mi
53:50
↑ 79↓ 1380.4%
15K· 9.32 mi
8:37/mi
1:20:35
↑ 67↓ 78
20K· 12.43 mi
8:43/mi
1:47:41
↑ 106↓ 860.1%
Half· 13.11 mi
8:43/mi
1:53:38
↑ 19↓ 370.5%
25K· 15.53 mi
8:52/mi
2:15:07
↑ 66↓ 880.2%
30K· 18.64 mi
9:32/mi
2:44:45
↑ 181↓ 1480.2%
20M
9:08/mi
2:57:10
↑ 64↓ 500.2%
21M
9:46/mi
3:06:56
↑ 106↓ 241.6%
35K· 21.75 mi
8:49/mi
3:13:32
↑ 17↓ 861.7%
23M
9:05/mi
3:24:54
↑ 23↓ 630.6%
24M
8:55/mi
3:33:49
↓ 821.3%
40K· 24.85 mi
9:17/mi
3:41:45
↓ 200.3%
25.2M
9:37/mi
3:45:04
↑ 13↓ 160.2%
Finish· 26.22 mi
8:48/mi
3:54:02
↑ 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
Time1:53:38
Pace8:40 /mi
2nd Half
Distance13.11 mi
Time2:00:24
Pace9:11 /mi
📊Positive Split: 6.0% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:20:2827:028:4227:02
8:42
-
10K
6.21 mi11:47:1653:508:4026:48
8:38
-0:04
15K
9.32 mi12:14:011:20:358:3926:45
8:37
-0:01
20K
12.43 mi12:41:071:47:418:4027:06
8:43
+0:06
Half
13.11 mi12:47:041:53:388:405:57
8:43
0:00
25K
15.53 mi13:08:332:15:078:4221:29
8:52
+0:09
30K
18.64 mi13:38:112:44:458:5029:38
9:32
+0:40
20M
20.00 mi13:50:362:57:108:5112:25
9:08
-0:24
21M
21.00 mi14:00:223:06:568:549:46
9:46
+0:38
35K
21.75 mi14:06:583:13:328:546:36
8:49
-0:57
23M
23.00 mi14:18:203:24:548:5511:22
9:05
+0:16
24M
24.00 mi14:27:153:33:498:558:55
8:55
-0:10
40K
24.85 mi14:35:113:41:458:557:56
9:17
+0:22
25.2M
25.20 mi14:38:303:45:048:563:19
9:37
+0:20
Finish
26.22 mi14:47:283:54:028:568:58
8:48
-0:49

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

8:37 /mi

Average Pace

8:56 /mi

Slowest Pace

9:46 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:11:19

82% of race

Time at Steady Pace

42:43

18% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:56 /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 mi11:20:2827:028:4227:02
8:42
#18902
10K
6.21 mi11:47:1653:508:4026:48
8:38
#18912
15K
9.32 mi12:14:011:20:358:3926:45
8:37
#18733
20K
12.43 mi12:41:071:47:418:4027:06
8:43
#18613
Half
13.11 mi12:47:041:53:388:405:57
8:43
#18629
25K
15.53 mi13:08:332:15:078:4221:29
8:52
#18569
30K
18.64 mi13:38:112:44:458:5029:38
9:32
#18783
20M
20.00 mi13:50:362:57:108:5112:25
9:08
#18665
21M
21.00 mi14:00:223:06:568:549:46
9:46
#18561
35K
21.75 mi14:06:583:13:328:546:36
8:49
#18487
23M
23.00 mi14:18:203:24:548:5511:22
9:05
#18354
24M
24.00 mi14:27:153:33:498:558:55
8:55
#18286
40K
24.85 mi14:35:113:41:458:557:56
9:17
#18269
25.2M
25.20 mi14:38:303:45:048:563:19
9:37
#18231
Finish
26.22 mi14:47:283:54:028:568:58
8:48
#18178
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF50-54Seg. OverallSeg. FemalesSeg. F50-54
5K3.11 mi3.11 mi189027139713918526(Top 70%)6819(Top 60%)6819(Top 565%)
10K6.21 mi3.10 mi18912-107088+517088+5118991(Top 71%)7076(Top 62%)7076(Top 586%)
15K9.32 mi3.11 mi18733+1796962+1266962+12618526(Top 70%)6819(Top 60%)6819(Top 565%)
20K12.43 mi3.11 mi18613+1206876+866876+8618266(Top 69%)6651(Top 58%)6651(Top 551%)
Half13.11 mi0.68 mi18629-166889-136889-1319087(Top 72%)7129(Top 62%)7129(Top 591%)
25K15.53 mi2.42 mi18569+606872+176872+1718285(Top 69%)6717(Top 59%)6717(Top 557%)
30K18.64 mi3.11 mi18783-2147019-1477019-14719577(Top 74%)7518(Top 66%)7518(Top 623%)
20M20.00 mi1.36 mi18665+1186963+566963+5617269(Top 65%)6320(Top 55%)6320(Top 524%)
21M21.00 mi1.00 mi18561+1046910+536910+5317144(Top 64%)6279(Top 55%)6279(Top 520%)
35K21.75 mi0.75 mi18487+746881+296881+2917102(Top 64%)6340(Top 56%)6340(Top 525%)
23M23.00 mi1.25 mi18354+1336821+606821+6016462(Top 62%)6006(Top 53%)6006(Top 498%)
24M24.00 mi1.00 mi18286+686791+306791+3016876(Top 63%)6291(Top 55%)6291(Top 521%)
40K24.85 mi0.85 mi18269+176799-86799-817446(Top 66%)6655(Top 58%)6655(Top 551%)
25.2M25.20 mi0.35 mi18231+386777+226777+2215823(Top 59%)5779(Top 51%)5779(Top 479%)
Finish26.22 mi1.02 mi18178+536756+216756+2117061(Top 64%)6413(Top 56%)6413(Top 531%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 70%
×21story building
+97ft-345ft

Overall

18526

Females

6819

F50-54

6819

5K→10K

3.1 - 6.2 mi

Top 71%
×5story building
+79ft-138ft

Overall

18991

Females

7076

F50-54

7076

10K→15K

6.2 - 9.3 mi

Top 70%
×3story building
+67ft-78ft

Overall

18526

Females

6819

F50-54

6819

15K→20K

9.3 - 12.4 mi

Top 69%
×5story building
+106ft-86ft

Overall

18266

Females

6651

F50-54

6651

20K→Half

12.4 - 13.1 mi

Top 72%
×2story building
+19ft-37ft

Overall

19087

Females

7129

F50-54

7129

Half→25K

13.1 - 15.5 mi

Top 69%
×4story building
+66ft-88ft

Overall

18285

Females

6717

F50-54

6717

25K→30K

15.5 - 18.6 mi

Top 74%
×9story building
+181ft-148ft

Overall

19577

Females

7518

F50-54

7518

30K→20M

18.6 - 20.0 mi

Top 65%
×5story building
+64ft-50ft

Overall

17269

Females

6320

F50-54

6320

20M→21M

20.0 - 21.0 mi

Top 64%
×8story building
+106ft-24ft

Overall

17144

Females

6279

F50-54

6279

21M→35K

21.0 - 21.8 mi

Top 64%
×7story building
+17ft-86ft

Overall

17102

Females

6340

F50-54

6340

35K→23M

21.8 - 23.0 mi

Top 62%
×5story building
+23ft-63ft

Overall

16462

Females

6006

F50-54

6006

23M→24M

23.0 - 24.0 mi

Top 63%
×6story building
+12ft-82ft

Overall

16876

Females

6291

F50-54

6291

24M→40K

24.0 - 24.9 mi

Top 66%
×1story
+6ft-20ft

Overall

17446

Females

6655

F50-54

6655

40K→25.2M

24.9 - 25.2 mi

Top 59%
×1story
+13ft-16ft

Overall

15823

Females

5779

F50-54

5779

25.2M→Finish

25.2 - 26.2 mi

Top 64%
×2story building
+22ft-21ft

Overall

17061

Females

6413

F50-54

6413

Passing Analysis

Category:
Athletes Passed
1927
Passed By
1203
Net Change
+724
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#18902
5K → 10K342352-10#18902#18912
10K → 15K287108+179#18912#18733
15K → 20K21999+120#18733#18613
20K → Half1935-16#18613#18629
Half → 25K15494+60#18629#18569
25K → 30K107321-214#18569#18783
30K → 20M14628+118#18783#18665
20M → 21M14440+104#18665#18561
21M → 35K8511+74#18561#18487
35K → 23M15623+133#18487#18354
23M → 24M8719+68#18354#18286
24M → 40K6245+17#18286#18269
40K → 25.2M457+38#18269#18231
25.2M → Finish7421+53#18231#18178
TOTALS19271203+724
📊

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