Boston Marathon logo
BOSTON MARATHON 2023

Sandee Bybee

Bib: 20674•F

UT

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 26622
Gender (Female)
#0 / 11423
Top 43%
Masters (Masters Women)
#0 / 6539
Top 30%
Division (F45-49)
#0 / 1817
Top 35%
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
8:22/mi
25:59
↑ 97↓ 3451.5%
10K· 6.21 mi
8:19/mi
51:50
↑ 79↓ 1380.4%
15K· 9.32 mi
8:12/mi
1:17:20
↑ 67↓ 78
20K· 12.43 mi
8:47/mi
1:44:37
↑ 106↓ 860.1%
Half· 13.11 mi
8:07/mi
1:50:09
↑ 19↓ 370.5%
25K· 15.53 mi
8:16/mi
2:10:11
↑ 66↓ 880.2%
30K· 18.64 mi
8:29/mi
2:36:32
↑ 181↓ 1480.2%
20M
8:25/mi
2:47:58
↑ 64↓ 500.2%
21M
8:58/mi
2:56:56
↑ 106↓ 241.6%
35K· 21.75 mi
8:07/mi
3:03:00
↑ 17↓ 861.7%
23M
8:14/mi
3:13:19
↑ 23↓ 630.6%
24M
8:08/mi
3:21:27
↓ 821.3%
40K· 24.85 mi
8:14/mi
3:28:29
↓ 200.3%
25.2M
9:02/mi
3:31:36
↑ 13↓ 160.2%
Finish· 26.22 mi
8:16/mi
3:40:01
↑ 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 Half⚖️ Balanced
Distance13.11 mi
Time1:50:09
Pace8:24 /mi
2nd Half⚖️ Balanced
Distance13.11 mi
Time1:49:52
Pace8:23 /mi
📊Even Split: Consistent pacing between halves

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:18:1525:598:2225:59
8:22
-
10K
6.21 mi11:44:0651:508:2125:51
8:19
-0:03
15K
9.32 mi12:09:361:17:208:1825:30
8:12
-0:07
20K
12.43 mi12:36:531:44:378:2527:17
8:47
+0:35
Half
13.11 mi12:42:251:50:098:245:32
8:07
-0:40
25K
15.53 mi13:02:272:10:118:2320:02
8:16
+0:09
30K
18.64 mi13:28:482:36:328:2426:21
8:29
+0:13
20M
20.00 mi13:40:142:47:588:2411:26
8:25
-0:04
21M
21.00 mi13:49:122:56:568:268:58
8:58
+0:33
35K
21.75 mi13:55:163:03:008:256:04
8:07
-0:51
23M
23.00 mi14:05:353:13:198:2410:19
8:14
+0:07
24M
24.00 mi14:13:433:21:278:248:08
8:08
-0:06
40K
24.85 mi14:20:453:28:298:237:02
8:14
+0:06
25.2M
25.20 mi14:23:523:31:368:243:07
9:02
+0:48
Finish
26.22 mi14:32:173:40:018:248:25
8:16
-0:46

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

8:07 /mi

Average Pace

8:24 /mi

Slowest Pace

9:02 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:27:56

95% of race

Time at Steady Pace

12:05

5% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:23 /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 mi11:18:1525:598:2225:59
8:22
#16605
10K
6.21 mi11:44:0651:508:2125:51
8:19
#16794
15K
9.32 mi12:09:361:17:208:1825:30
8:12
#16494
20K
12.43 mi12:36:531:44:378:2527:17
8:47
#17060
Half
13.11 mi12:42:251:50:098:245:32
8:07
#16964
25K
15.53 mi13:02:272:10:118:2320:02
8:16
#16611
30K
18.64 mi13:28:482:36:328:2426:21
8:29
#16140
20M
20.00 mi13:40:142:47:588:2411:26
8:25
#15899
21M
21.00 mi13:49:122:56:568:268:58
8:58
#15700
35K
21.75 mi13:55:163:03:008:256:04
8:07
#15589
23M
23.00 mi14:05:353:13:198:2410:19
8:14
#15327
24M
24.00 mi14:13:433:21:278:248:08
8:08
#15163
40K
24.85 mi14:20:453:28:298:237:02
8:14
#15030
25.2M
25.20 mi14:23:523:31:368:243:07
9:02
#14988
Finish
26.22 mi14:32:173:40:018:248:25
8:16
#14955
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF45-49Seg. OverallSeg. FemalesSeg. F45-49
5K3.11 mi3.11 mi166055670567015921(Top 60%)5247(Top 46%)5247(Top 289%)
10K6.21 mi3.10 mi16794-1895773-1035773-10317070(Top 64%)5911(Top 52%)5911(Top 325%)
15K9.32 mi3.11 mi16494+3005589+1845589+18415921(Top 60%)5247(Top 46%)5247(Top 289%)
20K12.43 mi3.11 mi17060-5665966-3775966-37718567(Top 70%)6826(Top 60%)6826(Top 376%)
Half13.11 mi0.68 mi16964+965906+605906+6015252(Top 57%)4837(Top 42%)4837(Top 266%)
25K15.53 mi2.42 mi16611+3535702+2045702+20414708(Top 55%)4654(Top 41%)4654(Top 256%)
30K18.64 mi3.11 mi16140+4715463+2395463+23914205(Top 53%)4457(Top 39%)4457(Top 245%)
20M20.00 mi1.36 mi15899+2415342+1215342+12113126(Top 49%)3933(Top 34%)3933(Top 216%)
21M21.00 mi1.00 mi15700+1995245+975245+9713245(Top 50%)4080(Top 36%)4080(Top 225%)
35K21.75 mi0.75 mi15589+1115191+545191+5412920(Top 49%)3973(Top 35%)3973(Top 219%)
23M23.00 mi1.25 mi15327+2625048+1435048+14311504(Top 43%)3266(Top 29%)3266(Top 180%)
24M24.00 mi1.00 mi15163+1644953+954953+9512184(Top 46%)3695(Top 32%)3695(Top 203%)
40K24.85 mi0.85 mi15030+1334896+574896+5711597(Top 44%)3475(Top 30%)3475(Top 191%)
25.2M25.20 mi0.35 mi14988+424884+124884+1212824(Top 48%)4157(Top 36%)4157(Top 229%)
Finish26.22 mi1.02 mi14955+334882+24882+213874(Top 52%)4677(Top 41%)4677(Top 257%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 60%
×21story building
+97ft-345ft

Overall

15921

Females

5247

F45-49

5247

5K→10K

3.1 - 6.2 mi

Top 64%
×5story building
+79ft-138ft

Overall

17070

Females

5911

F45-49

5911

10K→15K

6.2 - 9.3 mi

Top 60%
×3story building
+67ft-78ft

Overall

15921

Females

5247

F45-49

5247

15K→20K

9.3 - 12.4 mi

Top 70%
×5story building
+106ft-86ft

Overall

18567

Females

6826

F45-49

6826

20K→Half

12.4 - 13.1 mi

Top 57%
×2story building
+19ft-37ft

Overall

15252

Females

4837

F45-49

4837

Half→25K

13.1 - 15.5 mi

Top 55%
×4story building
+66ft-88ft

Overall

14708

Females

4654

F45-49

4654

25K→30K

15.5 - 18.6 mi

Top 53%
×9story building
+181ft-148ft

Overall

14205

Females

4457

F45-49

4457

30K→20M

18.6 - 20.0 mi

Top 49%
×5story building
+64ft-50ft

Overall

13126

Females

3933

F45-49

3933

20M→21M

20.0 - 21.0 mi

Top 50%
×8story building
+106ft-24ft

Overall

13245

Females

4080

F45-49

4080

21M→35K

21.0 - 21.8 mi

Top 49%
×7story building
+17ft-86ft

Overall

12920

Females

3973

F45-49

3973

35K→23M

21.8 - 23.0 mi

Top 43%
×5story building
+23ft-63ft

Overall

11504

Females

3266

F45-49

3266

23M→24M

23.0 - 24.0 mi

Top 46%
×6story building
+12ft-82ft

Overall

12184

Females

3695

F45-49

3695

24M→40K

24.0 - 24.9 mi

Top 44%
×1story
+6ft-20ft

Overall

11597

Females

3475

F45-49

3475

40K→25.2M

24.9 - 25.2 mi

Top 48%
×1story
+13ft-16ft

Overall

12824

Females

4157

F45-49

4157

25.2M→Finish

25.2 - 26.2 mi

Top 52%
×2story building
+22ft-21ft

Overall

13874

Females

4677

F45-49

4677

Passing Analysis

Category:
Athletes Passed
2897
Passed By
1247
Net Change
+1650
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#16605
5K → 10K226415-189#16605#16794
10K → 15K38888+300#16794#16494
15K → 20K59625-566#16494#17060
20K → Half993+96#17060#16964
Half → 25K3618+353#16964#16611
25K → 30K48716+471#16611#16140
30K → 20M2476+241#16140#15899
20M → 21M20910+199#15899#15700
21M → 35K1143+111#15700#15589
35K → 23M2664+262#15589#15327
23M → 24M1684+164#15327#15163
24M → 40K14310+133#15163#15030
40K → 25.2M5412+42#15030#14988
25.2M → Finish7643+33#14988#14955
TOTALS28971247+1650
📊

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