Boston Marathon logo
BOSTON MARATHON 2023

Jessica Byrnes

NJ

Bib: 18361 F

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 26622
Gender (Female)
#0 / 11423
Top 38%
Masters (Masters Women)
#0 / 6539
Top 25%
Division (F45-49)
#0 / 1817
Top 27%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
469 ft elev
5K· 3.11 mi
8:06/mi
25:11
↑ 97↓ 3451.5%
220 ft elev
10K· 6.21 mi
7:55/mi
49:47
↑ 79↓ 1380.4%
157 ft elev
15K· 9.32 mi
7:49/mi
1:14:03
↑ 67↓ 78
146 ft elev
20K· 12.43 mi
8:05/mi
1:39:11
↑ 106↓ 860.1%
165 ft elev
Half· 13.11 mi
8:01/mi
1:44:39
↑ 19↓ 370.5%
148 ft elev
25K· 15.53 mi
8:10/mi
2:04:27
↑ 66↓ 880.2%
127 ft elev
30K· 18.64 mi
8:24/mi
2:30:32
↑ 181↓ 1480.2%
138 ft elev
20M
8:34/mi
2:42:10
↑ 64↓ 500.2%
148 ft elev
21M
9:05/mi
2:51:15
↑ 106↓ 241.6%
227 ft elev
35K· 21.75 mi
8:48/mi
2:57:50
↑ 17↓ 861.7%
156 ft elev
23M
8:57/mi
3:09:02
↑ 23↓ 630.6%
116 ft elev
24M
8:52/mi
3:17:54
↓ 821.3%
34 ft elev
40K· 24.85 mi
8:44/mi
3:25:22
↓ 200.3%
20 ft elev
25.2M
9:08/mi
3:28:31
↑ 13↓ 160.2%
18 ft elev
Finish· 26.22 mi
8:04/mi
3:36:44
↑ 22↓ 21
17 ft elev
Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent

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
Time1:44:39
Pace7:59 /mi
2nd Half
Distance13.11 mi
Time1:52:05
Pace8:33 /mi
📊Positive Split: 7.1% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:16:1425:118:0625:11
8:06
-
10K
6.21 mi11:40:5049:478:0124:36
7:55
-0:11
15K
9.32 mi12:05:061:14:037:5724:16
7:49
-0:06
20K
12.43 mi12:30:141:39:117:5925:08
8:05
+0:16
Half
13.11 mi12:35:421:44:397:595:28
8:01
-0:04
25K
15.53 mi12:55:302:04:278:0119:48
8:10
+0:09
30K
18.64 mi13:21:352:30:328:0526:05
8:24
+0:14
20M
20.00 mi13:33:132:42:108:0611:38
8:34
+0:10
21M
21.00 mi13:42:182:51:158:099:05
9:05
+0:31
35K
21.75 mi13:48:532:57:508:116:35
8:48
-0:17
23M
23.00 mi14:00:053:09:028:1311:12
8:57
+0:09
24M
24.00 mi14:08:573:17:548:158:52
8:52
-0:05
40K
24.85 mi14:16:253:25:228:167:28
8:44
-0:08
25.2M
25.20 mi14:19:343:28:318:163:09
9:08
+0:24
Finish
26.22 mi14:27:473:36:448:168:13
8:04
-1:04

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

7:49 /mi

Average Pace

8:16 /mi

Slowest Pace

9:08 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:50:23

79% of race

Time at Steady Pace

46:21

21% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:16 /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 mi11:16:1425:118:0625:11
8:06
#14764
10K
6.21 mi11:40:5049:478:0124:36
7:55
#14477
15K
9.32 mi12:05:061:14:037:5724:16
7:49
#13940
20K
12.43 mi12:30:141:39:117:5925:08
8:05
#13951
Half
13.11 mi12:35:421:44:397:595:28
8:01
#13975
25K
15.53 mi12:55:302:04:278:0119:48
8:10
#13954
30K
18.64 mi13:21:352:30:328:0526:05
8:24
#13896
20M
20.00 mi13:33:132:42:108:0611:38
8:34
#13899
21M
21.00 mi13:42:182:51:158:099:05
9:05
#13880
35K
21.75 mi13:48:532:57:508:116:35
8:48
#13995
23M
23.00 mi14:00:053:09:028:1311:12
8:57
#14087
24M
24.00 mi14:08:573:17:548:158:52
8:52
#14215
40K
24.85 mi14:16:253:25:228:167:28
8:44
#14226
25.2M
25.20 mi14:19:343:28:318:163:09
9:08
#14202
Finish
26.22 mi14:27:473:36:448:168:13
8:04
#14115
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF45-49Seg. OverallSeg. FemalesSeg. F45-49
5K3.11 mi3.11 mi147644495449512848(Top 48%)3381(Top 30%)3381(Top 186%)
10K6.21 mi3.10 mi14477+2874327+1684327+16814147(Top 53%)4143(Top 36%)4143(Top 228%)
15K9.32 mi3.11 mi13940+5374025+3024025+30212848(Top 48%)3381(Top 30%)3381(Top 186%)
20K12.43 mi3.11 mi13951-114054-294054-2914169(Top 53%)4205(Top 37%)4205(Top 231%)
Half13.11 mi0.68 mi13975-244072-184072-1814542(Top 55%)4411(Top 39%)4411(Top 243%)
25K15.53 mi2.42 mi13954+214085-134085-1314012(Top 53%)4232(Top 37%)4232(Top 233%)
30K18.64 mi3.11 mi13896+584079+64079+613681(Top 51%)4143(Top 36%)4143(Top 228%)
20M20.00 mi1.36 mi13899-34099-204099-2014020(Top 53%)4420(Top 39%)4420(Top 243%)
21M21.00 mi1.00 mi13880+194103-44103-413911(Top 52%)4444(Top 39%)4444(Top 245%)
35K21.75 mi0.75 mi13995-1154195-924195-9216942(Top 64%)6236(Top 55%)6236(Top 343%)
23M23.00 mi1.25 mi14087-924281-864281-8615772(Top 59%)5610(Top 49%)5610(Top 309%)
24M24.00 mi1.00 mi14215-1284377-964377-9616586(Top 62%)6116(Top 54%)6116(Top 337%)
40K24.85 mi0.85 mi14226-114407-304407-3014731(Top 55%)5144(Top 45%)5144(Top 283%)
25.2M25.20 mi0.35 mi14202+244409-24409-213329(Top 50%)4400(Top 39%)4400(Top 242%)
Finish26.22 mi1.02 mi14115+874368+414368+4112589(Top 47%)4006(Top 35%)4006(Top 220%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 48%
×21story building
+97ft-345ft

Overall

12848

Females

3381

F45-49

3381

5K→10K

3.1 - 6.2 mi

Top 53%
×5story building
+79ft-138ft

Overall

14147

Females

4143

F45-49

4143

10K→15K

6.2 - 9.3 mi

Top 48%
×3story building
+67ft-78ft

Overall

12848

Females

3381

F45-49

3381

15K→20K

9.3 - 12.4 mi

Top 53%
×5story building
+106ft-86ft

Overall

14169

Females

4205

F45-49

4205

20K→Half

12.4 - 13.1 mi

Top 55%
×2story building
+19ft-37ft

Overall

14542

Females

4411

F45-49

4411

Half→25K

13.1 - 15.5 mi

Top 53%
×4story building
+66ft-88ft

Overall

14012

Females

4232

F45-49

4232

25K→30K

15.5 - 18.6 mi

Top 51%
×9story building
+181ft-148ft

Overall

13681

Females

4143

F45-49

4143

30K→20M

18.6 - 20.0 mi

Top 53%
×5story building
+64ft-50ft

Overall

14020

Females

4420

F45-49

4420

20M→21M

20.0 - 21.0 mi

Top 52%
×8story building
+106ft-24ft

Overall

13911

Females

4444

F45-49

4444

21M→35K

21.0 - 21.8 mi

Top 64%
×7story building
+17ft-86ft

Overall

16942

Females

6236

F45-49

6236

35K→23M

21.8 - 23.0 mi

Top 59%
×5story building
+23ft-63ft

Overall

15772

Females

5610

F45-49

5610

23M→24M

23.0 - 24.0 mi

Top 62%
×6story building
+12ft-82ft

Overall

16586

Females

6116

F45-49

6116

24M→40K

24.0 - 24.9 mi

Top 55%
×1story
+6ft-20ft

Overall

14731

Females

5144

F45-49

5144

40K→25.2M

24.9 - 25.2 mi

Top 50%
×1story
+13ft-16ft

Overall

13329

Females

4400

F45-49

4400

25.2M→Finish

25.2 - 26.2 mi

Top 47%
×2story building
+22ft-21ft

Overall

12589

Females

4006

F45-49

4006

Passing Analysis

Category:
Athletes Passed
2099
Passed By
1450
Net Change
+649
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#14764
5K → 10K454167+287#14764#14477
10K → 15K57033+537#14477#13940
15K → 20K181192-11#13940#13951
20K → Half2347-24#13951#13975
Half → 25K138117+21#13975#13954
25K → 30K210152+58#13954#13896
30K → 20M9699-3#13896#13899
20M → 21M9778+19#13899#13880
21M → 35K24139-115#13880#13995
35K → 23M60152-92#13995#14087
23M → 24M31159-128#14087#14215
24M → 40K6475-11#14215#14226
40K → 25.2M3612+24#14226#14202
25.2M → Finish11528+87#14202#14115
TOTALS20991450+649
📊

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